CN117705453A - Engine sound quality evaluation method and device - Google Patents
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a method and a device for evaluating sound quality of an engine. The method for evaluating the sound quality of the engine comprises the following steps: acquiring running noise information, an overall evaluation value of sound quality, a preset overall evaluation value of sound quality and objective parameter information of sound quality of an engine; determining semantic expression characteristic information of the sound quality parameters and an upper limit value and a lower limit value of the sound quality objective parameters according to the sound quality objective parameter information; acquiring a sound quality objective parameter limit value distribution curve according to the sound quality objective parameter information, the sound quality objective parameter upper limit value and the sound quality objective parameter lower limit value; determining objective parameter information of the sound quality to be optimized according to objective parameter information of the sound quality and a limit value distribution curve of the objective parameter of the sound quality; determining optimization information according to objective parameter information of sound quality to be optimized; and adjusting objective parameter information of the sound quality to be optimized according to the optimization information to finish sound quality evaluation. So as to improve the accurate investigation of the sound quality problem and realize the improvement of the sound quality.
Description
Technical Field
The invention relates to the technical field of engines, in particular to an engine sound quality evaluation method and device.
Background
As the engine industry evolves, not only are emissions requirements stricter, but also the driver's noise comfort requirements are higher. The sound quality reflects the visual perception of the engine noise by people, is the combined action of human psychological and physiological factors, and is more and more important in the engine evaluation.
In recent years, more and more researches on psychoacoustic indexes such as loudness, language definition, sharpness, roughness, jitter and the like are performed, but practical engineering applications are fewer, evaluation is performed on a single aspect, and accurate evaluation on the sound quality of an engine is difficult.
Disclosure of Invention
The invention provides a method and a device for evaluating the sound quality of an engine, which are used for improving the accurate investigation of the sound quality problem and realizing the improvement of the sound quality.
According to an aspect of the present invention, there is provided a method of evaluating sound quality of an engine, comprising:
acquiring operation noise information of an engine;
determining an overall evaluation value of sound quality according to the operation noise information;
acquiring a preset sound quality overall evaluation value;
Acquiring sound quality objective parameter information according to the sound quality overall evaluation value and the preset sound quality overall evaluation value;
determining semantic expression characteristic information of the sound quality parameters according to the sound quality objective parameter information;
determining an objective sound quality parameter upper limit value and an objective sound quality parameter lower limit value according to the semantic expression characteristic information of the sound quality parameters;
acquiring a sound quality objective parameter limit distribution curve according to the sound quality objective parameter information, the sound quality objective parameter upper limit value and the sound quality objective parameter lower limit value;
determining objective parameter information of the sound quality to be optimized according to the objective parameter information of the sound quality and the objective parameter limit value distribution curve of the sound quality;
determining optimization information according to the objective parameter information of the sound quality to be optimized;
and adjusting the objective parameter information of the sound quality to be optimized according to the optimization information to finish the sound quality evaluation.
Optionally, after obtaining the operation noise information of the engine, the method further includes:
screening according to the running noise information to obtain noise data to be evaluated;
acquiring subjective evaluation information of sound quality according to the noise data to be evaluated;
and acquiring the objective evaluation information of the sound quality according to the subjective evaluation information of the sound quality.
Optionally, obtaining the objective parameter information of the sound quality according to the overall evaluation value of the sound quality and the preset overall evaluation value of the sound quality includes:
judging whether the overall evaluation value of the sound quality is smaller than the preset overall evaluation value of the sound quality;
if yes, obtaining objective parameter information of sound quality;
if not, the sound quality evaluation is completed.
Optionally, obtaining the sound quality objective parameter limit distribution curve according to the sound quality objective parameter information, the sound quality objective parameter upper limit value and the sound quality objective parameter lower limit value includes:
acquiring a first preset conversion proportion and a second preset conversion proportion corresponding to the sound quality objective parameter information;
and acquiring an acoustic quality objective parameter limit distribution curve according to the acoustic quality objective parameter information, the first preset conversion proportion, the second preset conversion proportion, the acoustic quality objective parameter upper limit and the acoustic quality objective parameter lower limit.
Optionally, before determining the objective parameter information of the sound quality to be optimized according to the objective parameter information of the sound quality and the objective parameter limit value distribution curve of the sound quality, the method further includes:
and obtaining normalized sound quality objective parameter information according to the sound quality objective parameter information, the first preset conversion proportion and the second preset conversion proportion.
Optionally, based on a first formula, normalized objective parameter information of sound quality is obtained according to the objective parameter information of sound quality, the first preset conversion ratio and the second preset conversion ratio, where the first formula is:
；
wherein H is i Objective parameter information for normalizing sound quality; x is X i Objective parameter information for sound quality; a is that i The conversion ratio is a first preset conversion ratio; b (B) i The conversion ratio is a second preset.
Optionally, determining the objective parameter information of the sound quality to be optimized according to the objective parameter information of the sound quality and the objective parameter limit value distribution curve of the sound quality includes:
judging whether the sound quality objective parameter information is positioned in the distribution range of the sound quality objective parameter limit value distribution curve or not;
if yes, the sound quality objective parameter information is considered to be in a normal range;
if not, determining objective parameter information of the sound quality to be optimized.
Optionally, determining the optimization information according to the objective parameter information of the sound quality to be optimized includes:
acquiring frequency characteristic analysis information, subjective return visit confirmation information and noise source identification information of an acoustic camera according to the objective parameter information of the sound quality to be optimized;
and determining optimization information according to the frequency characteristic analysis information, the subjective return visit confirmation information and the noise source identification information of the acoustic camera.
According to another aspect of the present invention, there is provided an engine sound quality evaluation device including the engine sound quality evaluation method of any one of the above aspects, the engine sound quality evaluation device including:
the running noise information acquisition module is used for acquiring the running noise information of the engine;
the sound quality overall evaluation value determining module is used for determining a sound quality overall evaluation value according to the running noise information;
the preset sound quality overall evaluation value acquisition module is used for acquiring a preset sound quality overall evaluation value;
the sound quality objective parameter information acquisition module is used for acquiring sound quality objective parameter information according to the sound quality overall evaluation value and the preset sound quality overall evaluation value;
the sound quality parameter semantic expression characteristic information determining module is used for determining sound quality parameter semantic expression characteristic information according to the sound quality objective parameter information;
the sound quality objective parameter upper limit value and sound quality objective parameter lower limit value determining module is used for determining a sound quality objective parameter upper limit value and a sound quality objective parameter lower limit value according to the sound quality parameter semantic expression characteristic information;
the sound quality objective parameter limit value distribution curve acquisition module is used for acquiring a sound quality objective parameter limit value distribution curve according to the sound quality objective parameter information, the sound quality objective parameter upper limit value and the sound quality objective parameter lower limit value;
The to-be-optimized sound quality objective parameter information determining module is used for determining to-be-optimized sound quality objective parameter information according to the sound quality objective parameter information and the sound quality objective parameter limit value distribution curve;
the optimization information determining module is used for determining optimization information according to the objective parameter information of the sound quality to be optimized;
and the objective parameter information adjustment module for the sound quality to be optimized is used for adjusting the objective parameter information of the sound quality to be optimized according to the optimization information to finish the sound quality evaluation.
According to the technical scheme provided by the embodiment of the invention, the method for evaluating the sound quality of the engine comprises the following steps: acquiring operation noise information of an engine; determining an overall evaluation value of sound quality according to the operation noise information; acquiring a preset sound quality overall evaluation value; acquiring sound quality objective parameter information according to the sound quality overall evaluation value and the preset sound quality overall evaluation value; determining semantic expression characteristic information of the sound quality parameters according to the sound quality objective parameter information; determining an objective sound quality parameter upper limit value and an objective sound quality parameter lower limit value according to the semantic expression characteristic information of the sound quality parameter; acquiring a sound quality objective parameter limit value distribution curve according to the sound quality objective parameter information, the sound quality objective parameter upper limit value and the sound quality objective parameter lower limit value; determining objective parameter information of the sound quality to be optimized according to objective parameter information of the sound quality and a limit value distribution curve of the objective parameter of the sound quality; determining optimization information according to objective parameter information of sound quality to be optimized; and adjusting objective parameter information of the sound quality to be optimized according to the optimization information to finish sound quality evaluation. So as to improve the accurate investigation of the sound quality problem and realize the improvement of the sound quality.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flowchart of an engine sound quality evaluation method according to an embodiment of the present invention;
FIG. 2 is a flowchart of another method for evaluating engine sound quality according to an embodiment of the present invention;
FIG. 3 is a flowchart of another method for evaluating engine sound quality according to an embodiment of the present invention;
FIG. 4 is a flowchart of another method for evaluating engine sound quality according to an embodiment of the present invention;
FIG. 5 is a flowchart of another method for evaluating engine sound quality according to an embodiment of the present invention;
FIG. 6 is a flowchart of another method for evaluating engine sound quality according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of an objective parameter limit distribution curve of sound quality according to an embodiment of the present invention;
FIG. 8 is a flowchart of another method for evaluating engine sound quality according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of an engine sound quality evaluation device according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a flowchart of an engine sound quality evaluation method according to an embodiment of the present invention, where the method may be performed by an engine sound quality evaluation device, and the engine sound quality evaluation device may be implemented in hardware and/or software, and the engine sound quality evaluation device may be configured in a vehicle. As shown in fig. 1, the method includes:
s101, acquiring operation noise information of an engine.
And acquiring the operation noise information of the engine according to the operation condition of the engine or the whole vehicle.
S102, determining an overall evaluation value of sound quality according to the operation noise information.
The collected running noise information is screened and analyzed, and meanwhile subjective evaluation information and objective evaluation can be matched to determine the sound quality total price evaluation information of the engine, and the sound quality is considered to be good as the score of the sound quality total price evaluation information is higher; if the score of the total price evaluation information of the sound quality is lower than the acceptable range, the sound quality is considered to be poor, and optimization and promotion are required.
S103, acquiring a total evaluation value of the preset sound quality.
The preset sound quality overall evaluation value can be selected according to actual design requirements, and stored in advance, and can be an acceptable minimum sound quality limit value, so that the subsequent sound quality overall evaluation value and the preset sound quality overall evaluation value can be compared to judge the sound quality conveniently.
S104, acquiring the objective parameter information of the sound quality according to the overall evaluation value of the sound quality and the overall evaluation value of the preset sound quality.
When the overall evaluation value of the sound quality is smaller than the preset overall evaluation value of the sound quality, objective parameter information of the sound quality is required to be obtained, and thenAnd correspondingly processing the sound quality objective parameter information to ensure multidimensional analysis of the sound quality, wherein the sound quality objective parameter can comprise key sound quality objective parameters such as loudness, sound pressure level, loudness ratio, pulse degree, kurtosis, contrast, roughness, fluctuation degree, sharpness, purity and the like. Evaluating the interpretation degree R of the change of the selected objective parameter on the subjective score in the regression model according to the index R for judging the linear correlation between the selected objective parameter and the subjective score 2 Probability of accidental coincidence of the selected objective parameter value with the weight of the hearing test P% and residual relevance Rresid, according to R, R 2 Sorting the objective parameters of the sound quality, namely, P% and R resid, identifying the objective parameters of the key sound quality, and reducing the dimension of the objective parameters of the sound quality to keep the objective dimension of the sound quality at about 5, wherein the smaller the value of P% is, the better the R resid represents the correlation degree between the unselected objective parameters and the residual error of the fitting model, and the correlation degree needs to be as low as possible.
S105, determining semantic expression characteristic information of the sound quality parameters according to the objective parameter information of the sound quality.
The sound quality parameter semantic expression characteristic information is correspondingly designed according to the sound quality objective parameter information, and can be a semantic expression word pair, and exemplary sound quality objective parameter information can include characteristics describing noise, namely wave sense, sharpness, sound size and impact sense, and the sound quality parameter semantic expression characteristic information can include stable and rough, stable and fluctuant corresponding to the fluctuation sense; the sharpness corresponds to the smoothness, the no-harshness, the rapidness, the low-sinking and the light; quiet and crisp, powerful and noisy corresponding to sound size; a stable and impact corresponding to the impact sensation; compact and rough, as shown in table 1.
TABLE 1 Sound quality Objective parameter information and Sound quality parameter semantic expression characteristic information correspondence
S106, determining the upper limit value of the objective sound quality parameter and the lower limit value of the objective sound quality parameter according to the semantic expression characteristic information of the sound quality parameter.
The scoring is further performed by the corresponding relation between the objective parameter information of the sound quality and the semantic expression characteristic information of the sound quality parameter, and then the excellent value and the acceptable limit value of the objective parameter of the sound quality are defined according to the scoring condition, namely, the upper limit value of the objective parameter of the sound quality and the lower limit value of the objective parameter of the sound quality are defined, and the upper limit value of the objective parameter of the sound quality can be 6 points and the lower limit value of the objective parameter of the sound quality can be 3 points.
S107, obtaining the sound quality objective parameter limit distribution curve according to the sound quality objective parameter information, the sound quality objective parameter upper limit value and the sound quality objective parameter lower limit value.
The sound quality objective parameter limit value comprises an acceptable minimum limit value and a maximum limit value, and further the sound quality objective parameter limit value distribution curve is obtained according to the sound quality objective parameter, the acceptable minimum limit value and the maximum limit value.
S108, determining the objective parameter information of the sound quality to be optimized according to the objective parameter information of the sound quality and the objective parameter limit value distribution curve of the sound quality.
Comparing by utilizing the sound quality objective parameter information and the sound quality objective parameter limit value distribution curve, and judging whether the sound quality objective parameter information is positioned between the acceptable minimum limit value and the maximum limit value, is higher than the maximum limit value or is smaller than the minimum limit value, and if the sound quality objective parameter information is positioned between the acceptable minimum limit value and the maximum limit value, judging that the sound quality objective parameter information is qualified; when the sound quality objective parameter information is smaller than the acceptable minimum limit value, the sound quality objective parameter information to be optimized is considered to exist in the sound quality objective parameter information; when the sound quality objective parameter information is larger than the maximum limit value, the sound quality objective parameter information is considered to be at an excellent level.
S109, determining optimization information according to objective parameter information of the sound quality to be optimized.
S110, adjusting objective parameter information of the sound quality to be optimized according to the optimization information, and finishing sound quality evaluation.
And correspondingly determining optimization information according to the objective parameter information of the sound quality to be optimized, and further adjusting the objective parameter information of the sound quality to be optimized according to the optimization information, so that the objective parameter information of the sound quality to be optimized is convenient to optimize and promote until the sound quality meets the requirement, thereby completing the sound quality evaluation.
According to the embodiment of the invention, through obtaining the running noise information of the engine, further determining the overall evaluation value of the sound quality, obtaining the overall evaluation value of the preset sound quality, obtaining the objective parameter information of the sound quality according to the overall evaluation value of the sound quality and the overall evaluation value of the preset sound quality, determining the semantic expression characteristic information of the sound quality parameter according to the objective parameter information of the sound quality, determining the upper limit value of the objective parameter of the sound quality and the lower limit value of the objective parameter of the sound quality according to the semantic expression characteristic information of the sound quality parameter, and determining the objective parameter information of the sound quality to be optimized according to the distribution curve of the objective parameter information of the sound quality and the objective parameter limit value of the sound quality; and determining optimization information according to the objective parameter information of the sound quality to be optimized, adjusting the objective parameter information of the sound quality to be optimized according to the optimization information, and finishing sound quality evaluation so as to improve the accurate investigation of the sound quality problem and realize the improvement of the sound quality.
Optionally, fig. 2 is a flowchart of another method for evaluating sound quality of an engine according to an embodiment of the present invention, as shown in fig. 2, where the method includes:
s201, obtaining operation noise information of an engine.
S202, screening according to the operation noise information to obtain noise data to be evaluated.
And screening the operation noise information through a subjective evaluation playback system, screening noise data to be evaluated for subjective evaluation, and storing the noise data into a subjective evaluation database.
S203, acquiring subjective evaluation information of sound quality according to the noise data to be evaluated.
The subjective evaluation is carried out according to the noise data to be evaluated, and a scoring mode is generally adopted in the subjective evaluation, so that the subjective evaluation information of the sound quality is obtained for each noise data to be evaluated.
S204, obtaining objective evaluation information of the sound quality according to the subjective evaluation information of the sound quality.
And acquiring objective evaluation information of the sound quality according to the subjective evaluation information of the sound quality, so as to ensure the accuracy of the sound quality evaluation. The objective sound quality evaluation information may include information such as the number of key objective sound quality parameters and objective sound quality parameters.
S205, determining the overall evaluation value of the sound quality according to the objective evaluation information of the sound quality.
Wherein, the overall evaluation value of sound quality is determined to satisfy a formula according to the objective evaluation information of sound qualityThe method comprises the steps of carrying out a first treatment on the surface of the Wherein Metric is the overall evaluation value of sound quality, m is the number of key objective sound quality parameters, x i As the weight coefficient, P i And C is a fitting formula constant for objective sound quality parameters.
S206, acquiring a total evaluation value of the preset sound quality.
S207, acquiring the objective parameter information of the sound quality according to the overall evaluation value of the sound quality and the overall evaluation value of the preset sound quality.
S208, determining semantic expression characteristic information of the sound quality parameters according to the objective parameter information of the sound quality.
S209, determining the upper limit value of the objective sound quality parameter and the lower limit value of the objective sound quality parameter according to the semantic expression characteristic information of the sound quality parameter.
S210, obtaining an acoustic quality objective parameter limit distribution curve according to the acoustic quality objective parameter information, the acoustic quality objective parameter upper limit value and the acoustic quality objective parameter lower limit value.
S211, determining the objective parameter information of the sound quality to be optimized according to the objective parameter information of the sound quality and the objective parameter limit value distribution curve of the sound quality.
S212, determining optimization information according to objective parameter information of the sound quality to be optimized.
And S213, adjusting objective parameter information of the sound quality to be optimized according to the optimization information, and finishing sound quality evaluation.
According to the embodiment of the invention, the operation noise information of the engine is acquired, the noise data to be evaluated is obtained by screening according to the operation noise information, the subjective evaluation information of the sound quality is obtained according to the noise data to be evaluated, the objective evaluation information of the sound quality is obtained according to the subjective evaluation information of the sound quality, and then the overall evaluation value of the sound quality is determined according to the objective evaluation information of the sound quality, so that the accurate investigation of the sound quality problem is improved, and the improvement of the sound quality is realized.
Optionally, fig. 3 is a flowchart of another method for evaluating sound quality of an engine according to an embodiment of the present invention, as shown in fig. 3, where the method includes:
s301, acquiring operation noise information of an engine.
S302, screening according to the operation noise information to obtain noise data to be evaluated.
S303, acquiring subjective evaluation information of sound quality according to the noise data to be evaluated.
S304, obtaining objective evaluation information of the sound quality according to the subjective evaluation information of the sound quality.
S305, determining the overall evaluation value of the sound quality according to the objective evaluation information of the sound quality.
S306, acquiring a total evaluation value of the preset sound quality.
S307, judging whether the overall evaluation value of the sound quality is smaller than a preset overall evaluation value of the sound quality; if yes, go to step S308; if not, step S309 is performed.
S308, obtaining objective parameter information of sound quality.
S309, the sound quality evaluation is completed.
When the overall evaluation value of the sound quality is smaller than the preset overall evaluation value of the sound quality, partial noise sources exist in the sound quality to optimize, so that objective parameter information of the sound quality is obtained, and optimization is guaranteed; and when the overall evaluation value of the sound quality is greater than or equal to the preset paranoid execution overall evaluation information, the sound quality is considered to meet the requirements, and the sound quality evaluation is completed.
S310, determining semantic expression characteristic information of the sound quality parameters according to the objective parameter information of the sound quality.
S311, determining the upper limit value of the objective sound quality parameter and the lower limit value of the objective sound quality parameter according to the semantic expression characteristic information of the sound quality parameter.
S312, obtaining the sound quality objective parameter limit distribution curve according to the sound quality objective parameter information, the sound quality objective parameter upper limit value and the sound quality objective parameter lower limit value.
S313, determining the objective parameter information of the sound quality to be optimized according to the objective parameter information of the sound quality and the objective parameter limit value distribution curve of the sound quality.
S314, determining optimization information according to objective parameter information of the sound quality to be optimized.
S315, adjusting objective parameter information of the sound quality to be optimized according to the optimization information, and finishing sound quality evaluation.
According to the embodiment of the invention, the overall evaluation value of the sound quality is compared with the overall evaluation value of the preset sound quality, so that the sound quality evaluation is finished or the objective parameter information of the sound quality is continuously acquired, the objective parameter information of the sound quality to be optimized is acquired and optimized, the accurate investigation of the sound quality problem is improved, and the improvement of the sound quality is realized.
Optionally, fig. 4 is a flowchart of another method for evaluating sound quality of an engine according to an embodiment of the present invention, as shown in fig. 4, where the method includes:
s501, operation noise information of the engine is acquired.
S502, screening according to the operation noise information to obtain noise data to be evaluated.
S503, obtaining subjective evaluation information of sound quality according to the noise data to be evaluated.
S504, obtaining objective evaluation information of the sound quality according to the subjective evaluation information of the sound quality.
S505, determining the overall evaluation value of the sound quality according to the objective evaluation information of the sound quality.
S506, acquiring a total evaluation value of the preset sound quality.
S507, judging whether the overall evaluation value of the sound quality is smaller than a preset overall evaluation value of the sound quality; if yes, go to step S508; if not, step S509 is performed.
S508, obtaining objective parameter information of sound quality.
S509, the acoustic quality evaluation is completed.
S510, determining semantic expression characteristic information of the sound quality parameters according to the objective parameter information of the sound quality.
S511, determining the upper limit value of the objective sound quality parameter and the lower limit value of the objective sound quality parameter according to the semantic expression characteristic information of the sound quality parameter.
S512, a first preset conversion ratio and a second preset conversion ratio corresponding to the objective parameter information of the sound quality are obtained.
Wherein, according to the sound quality objective parameter information, the key sound quality objective parameters including loudness N5, sound pressure level, loudness ratio, pulse degree, kurtosis, contrast, roughness, fluctuation degree, sharpness, pure tone degree and the like can be included, and the difference between the maximum value and the minimum value of the sound quality objective parameter information of all samples is defined as a first conversion ratio A i Defining the minimum value of the objective parameter information of the sound quality as a second conversion proportion B i The sound quality objective parameter information statistical schematic table is shown in table 2.
TABLE 2 statistical schematic representation of objective parameter information of sound quality
S513, obtaining an acoustic quality objective parameter limit distribution curve according to the acoustic quality objective parameter information, the first preset conversion proportion, the second preset conversion proportion, the acoustic quality objective parameter upper limit and the acoustic quality objective parameter lower limit.
The sound quality objective parameter limit distribution curve can be obtained after multidimensional normalization processing is carried out according to sound quality objective parameter information, a first preset conversion proportion, a second preset conversion proportion, a sound quality objective parameter upper limit value and a sound quality objective parameter lower limit value, so that the fact that the subsequent sound quality objective parameters can correspondingly judge on the sound quality objective parameter limit distribution curve is ensured, and whether optimization is needed is determined.
S514, determining the objective parameter information of the sound quality to be optimized according to the objective parameter information of the sound quality, the upper limit value of the objective parameter of the sound quality, the lower limit value of the objective parameter of the sound quality and the distribution curve of the limit value of the objective parameter of the sound quality.
And S515, determining optimization information according to objective parameter information of the sound quality to be optimized.
S516, adjusting objective parameter information of the sound quality to be optimized according to the optimization information, and finishing sound quality evaluation.
According to the embodiment of the invention, the first preset conversion proportion and the second preset conversion proportion corresponding to the sound quality objective parameter information are obtained, so that the sound quality objective parameter limit distribution curve is obtained according to the sound quality objective parameter information, the first preset conversion proportion, the second preset conversion proportion, the upper limit value of the sound quality objective parameter and the lower limit value of the sound quality objective parameter, visual judgment of each sound quality objective parameter in each sound quality objective parameter information is facilitated, the sound quality objective parameter information to be optimized is further determined, meanwhile, the sound quality is improved by improving the accurate investigation of the sound quality problem, and the accuracy of sound quality evaluation is ensured.
Optionally, fig. 5 is a flowchart of another method for evaluating sound quality of an engine according to an embodiment of the present invention, as shown in fig. 5, where the method includes:
s601, acquiring operation noise information of an engine.
S602, screening according to the operation noise information to obtain noise data to be evaluated.
S603, acquiring subjective evaluation information of sound quality according to the noise data to be evaluated.
S604, obtaining the objective evaluation information of the sound quality according to the subjective evaluation information of the sound quality.
S605, determining the overall evaluation value of the sound quality according to the objective evaluation information of the sound quality.
S606, acquiring a preset sound quality overall evaluation value.
S607, judging whether the overall evaluation value of the sound quality is smaller than a preset overall evaluation value of the sound quality; if yes, go to step S608; if not, step S609 is performed.
S608, obtaining objective parameter information of sound quality.
S609, the acoustic quality evaluation is completed.
S610, determining semantic expression characteristic information of the sound quality parameters according to the objective parameter information of the sound quality.
S611, determining the upper limit value of the objective sound quality parameter and the lower limit value of the objective sound quality parameter according to the semantic expression characteristic information of the sound quality parameter.
S612, obtaining a first preset conversion ratio and a second preset conversion ratio corresponding to the objective parameter information of the sound quality.
S613, obtaining an acoustic quality objective parameter limit distribution curve according to the acoustic quality objective parameter information, the first preset conversion proportion, the second preset conversion proportion, the acoustic quality objective parameter upper limit and the acoustic quality objective parameter lower limit.
S614, obtaining normalized sound quality objective parameter information according to the sound quality objective parameter information, the first preset conversion ratio and the second preset conversion ratio.
Wherein, optionally, based on the first formulaThe method comprises the steps of carrying out a first treatment on the surface of the Wherein H is i Objective parameter information for normalizing sound quality; x is X i Objective parameter information for sound quality; a is that i The conversion ratio is a first preset conversion ratio; b (B) i The conversion ratio is a second preset. And carrying out normalization processing on each sound quality objective parameter in the sound quality objective parameter information, as shown in table 2, further obtaining normalized sound quality objective parameter information so as to establish a multi-dimensional sound quality parameter evaluation system, so that each sound quality objective parameter is evaluated in a unified dimension, the sound quality objective parameter information to be optimized is rapidly and accurately identified, and the sound quality evaluation accuracy is improved.
S615, determining the objective parameter information of the sound quality to be optimized according to the normalized objective parameter information of the sound quality, the upper limit value of the objective parameter of the sound quality, the lower limit value of the objective parameter of the sound quality and the distribution curve of the limit value of the objective parameter of the sound quality.
S616, optimizing information is determined according to the objective parameter information of the sound quality to be optimized.
S617, adjusting objective parameter information of the sound quality to be optimized according to the optimization information, and finishing sound quality evaluation.
According to the embodiment of the invention, the normalized sound quality objective parameter information is obtained according to the sound quality objective parameter information, the first preset conversion proportion and the second preset conversion proportion, and then the sound quality objective parameter information to be optimized is intuitively determined by combining the sound quality objective parameter upper limit value, the sound quality objective parameter lower limit value and the sound quality objective parameter limit value distribution curve, so that the accurate investigation of the sound quality problem is improved, the improvement of the sound quality is realized, and the accuracy of sound quality evaluation is ensured.
Optionally, fig. 6 is a flowchart of another method for evaluating sound quality of an engine according to an embodiment of the present invention, as shown in fig. 6, where the method includes:
s701, operation noise information of the engine is acquired.
S702, screening according to the operation noise information to obtain noise data to be evaluated.
S703, obtaining subjective evaluation information of sound quality according to the noise data to be evaluated.
S704, obtaining the objective evaluation information of the sound quality according to the subjective evaluation information of the sound quality.
S705, determining the overall evaluation value of the sound quality based on the objective evaluation information of the sound quality.
S706, acquiring a preset sound quality overall evaluation value.
S707, judging whether the overall evaluation value of the sound quality is smaller than a preset overall evaluation value of the sound quality; if yes, go to step S708; if not, step S709 is performed.
S708, acquiring objective parameter information of sound quality.
S709, the acoustic quality evaluation is completed.
S710, determining semantic expression characteristic information of the sound quality parameters according to the objective parameter information of the sound quality.
S711, determining the upper limit value of the objective sound quality parameter and the lower limit value of the objective sound quality parameter according to the semantic expression characteristic information of the sound quality parameter.
S712, a first preset conversion ratio and a second preset conversion ratio corresponding to the objective parameter information of the sound quality are obtained.
S713, obtaining an acoustic quality objective parameter limit distribution curve according to the acoustic quality objective parameter information, the first preset conversion proportion, the second preset conversion proportion, the acoustic quality objective parameter upper limit and the acoustic quality objective parameter lower limit.
S714, obtaining normalized sound quality objective parameter information according to the sound quality objective parameter information, the first preset conversion proportion and the second preset conversion proportion.
S715, judging whether the normalized sound quality objective parameter information is located in the distribution range of the sound quality objective parameter limit value distribution curve; if yes, go to step S716; if not, go to step S717.
And S716, considering that the objective parameter information of the sound quality is in a normal range.
S717, the objective parameter information of the sound quality to be optimized is determined.
Judging whether the normalized sound quality objective parameter information is in the distribution range of the sound quality objective parameter limit value distribution curve according to the normalized sound quality objective parameter information and the sound quality objective parameter limit value distribution curve, if so, considering that the sound quality objective parameter information is in the normal range, namely the acceptable range; if not, the part of the objective parameters of the sound quality are considered to be optimized and improved, namely, the objective parameter information of the sound quality to be optimized is determined to be optimized, and the sound quality level is ensured. FIG. 7 is a schematic diagram of a limit distribution curve of objective parameters of sound quality, as shown in FIG. 7, where the abscissa is the objective parameter of sound quality, the ordinate is the dispersion band of sound quality, the smaller the value of the dispersion band of sound quality is, the better the sound quality is considered, when the objective parameter of sound quality to be evaluated in a sound quality dimension is higher than the acceptable dispersion band, the objective parameter of sound quality in the dimension exceeds the normal range, the disqualification of sound quality in the dimension is defined, when the dimensions exceed the normal range, the sorting is performed according to the height of the deviation from the acceptable line, the higher the deviation is, and the greater the influence on sound quality is; when the objective sound quality parameter is in the dispersion band, the sound quality parameter in the dimension is in a normal range, and the sound quality in the dimension is qualified; when the objective parameter of sound quality is below the excellent dispersion band, the objective parameter of sound quality in the dimension is at an excellent level, and the excellent sound quality in the dimension is defined. As shown in fig. 7, the loudness N5 and the relativity are both higher than the distribution range of the acoustic quality objective parameter limit distribution curve, the relativity is considered to be optimized, while the pure soundness is considered to be at an excellent level when the pure soundness is lower than the distribution range of the acoustic quality objective parameter limit distribution curve, and the remaining acoustic quality objective parameters are all within the normal range.
S718, optimizing information is determined according to objective parameter information of the sound quality to be optimized.
And S719, adjusting objective parameter information of the sound quality to be optimized according to the optimization information, and finishing sound quality evaluation.
According to the embodiment of the invention, whether the normalized objective parameter information is located in the subsection range of the objective parameter limit value distribution curve of the sound quality is judged, and the objective parameter information of the sound quality to be optimized is determined by entering the visual determination of the sound quality level, so that the accurate investigation of the sound quality problem is improved, the improvement of the sound quality is realized, and the accuracy of the sound quality evaluation is ensured.
Optionally, fig. 8 is a flowchart of another method for evaluating sound quality of an engine according to an embodiment of the present invention, as shown in fig. 8, where the method includes:
s801, operation noise information of the engine is acquired.
S802, screening according to the operation noise information to obtain noise data to be evaluated.
S803, obtaining subjective evaluation information of sound quality according to the noise data to be evaluated.
S804, obtaining the objective evaluation information of the sound quality according to the subjective evaluation information of the sound quality.
S805, determining the overall evaluation value of the sound quality according to the objective evaluation information of the sound quality.
S806, acquiring a total evaluation value of the preset sound quality.
S807, judging whether the overall evaluation value of the sound quality is smaller than a preset overall evaluation value of the sound quality; if yes, go to step S808; if not, step S809 is performed.
S808, obtaining objective parameter information of sound quality.
S809, the acoustic quality evaluation is completed.
S810, determining semantic expression characteristic information of the sound quality parameters according to the objective parameter information of the sound quality.
S811, determining the upper limit value of the objective sound quality parameter and the lower limit value of the objective sound quality parameter according to the semantic expression characteristic information of the sound quality parameter.
S812, a first preset conversion ratio and a second preset conversion ratio corresponding to the objective parameter information of the sound quality are obtained.
S813, obtaining an acoustic quality objective parameter limit value distribution curve according to the acoustic quality objective parameter information, the first preset conversion proportion, the second preset conversion proportion, the acoustic quality objective parameter upper limit value and the acoustic quality objective parameter lower limit value.
S814, obtaining normalized sound quality objective parameter information according to the sound quality objective parameter information, the first preset conversion ratio and the second preset conversion ratio.
S815, judging whether the normalized sound quality objective parameter information is located in the distribution range of the sound quality objective parameter limit value distribution curve; if yes, go to step S816; if not, step S817 is performed.
And S816, the objective parameter information of the sound quality is considered to be in a normal range.
S817, determining objective parameter information of the sound quality to be optimized.
S818, acquiring frequency characteristic analysis information, subjective return visit confirmation information and noise source identification information of the acoustic camera according to objective parameter information of the sound quality to be optimized.
And S819, determining optimization information according to the frequency characteristic analysis information, the subjective return visit confirmation information and the noise source identification information of the acoustic camera.
After the objective parameter information of the sound quality to be optimized is determined, special noise source identification and optimization are required to be performed according to the dominant and subordinate sound quality, and frequency characteristic analysis information, subjective return visit confirmation information and acoustic camera noise source identification information are generally required to be acquired, so that specific noise sources are identified, and accordingly optimization information is determined according to the frequency characteristic analysis information, the subjective return visit confirmation information and the acoustic camera noise source identification information to perform corresponding optimization on the objective parameter of the sound quality to be optimized, and the overall sound quality level is guaranteed to meet the requirements.
S820, adjusting objective parameter information of the sound quality to be optimized according to the optimization information, and finishing sound quality evaluation.
According to the embodiment of the invention, the frequency characteristic analysis information, the subjective return visit confirmation information and the noise source identification information of the acoustic camera are obtained according to the objective parameter information of the sound quality to be optimized, so that the optimization information is determined to perform corresponding optimization processing on the objective parameter of the sound quality to be optimized, and the effective improvement of the sound quality is realized.
Fig. 9 is a schematic structural diagram of an engine sound quality evaluation device according to an embodiment of the present invention, and as shown in fig. 9, the engine sound quality evaluation device includes the engine sound quality evaluation method according to any one of the above embodiments, and the engine sound quality evaluation device includes:
an operation noise information acquisition module 201 for acquiring operation noise information of an engine;
an overall evaluation value of sound quality determining module 202 for determining an overall evaluation value of sound quality from the operation noise information;
the preset sound quality overall evaluation value obtaining module 203 is configured to obtain a preset sound quality overall evaluation value;
the sound quality objective parameter information obtaining module 204 is configured to obtain sound quality objective parameter information according to the sound quality overall evaluation value and a preset sound quality overall evaluation value;
the sound quality parameter semantic expression feature information determining module 205 is configured to determine sound quality parameter semantic expression feature information according to the sound quality objective parameter information;
the sound quality objective parameter upper limit value and sound quality objective parameter lower limit value determining module 206 is configured to determine a sound quality objective parameter upper limit value and a sound quality objective parameter lower limit value according to the sound quality parameter semantic expression feature information;
The acoustic quality objective parameter limit value distribution curve obtaining module 207 is configured to obtain an acoustic quality objective parameter limit value distribution curve according to the acoustic quality objective parameter information, the acoustic quality objective parameter upper limit value, and the acoustic quality objective parameter lower limit value;
the to-be-optimized sound quality objective parameter information determining module 208 is configured to determine to-be-optimized sound quality objective parameter information according to the sound quality objective parameter information and the sound quality objective parameter limit distribution curve;
an optimization information determining module 209, configured to determine optimization information according to objective parameter information of the sound quality to be optimized;
the objective parameter information adjustment module 210 for sound quality to be optimized is configured to adjust objective parameter information for sound quality to be optimized according to the optimization information, and complete sound quality evaluation.
It should be noted that, since the engine sound quality evaluation device provided in this embodiment includes any of the engine sound quality evaluation methods provided in the embodiments of the present invention, the engine sound quality evaluation method has the same or corresponding advantages, and details are not repeated here.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (9)
1. An engine sound quality evaluation method, comprising:
acquiring operation noise information of an engine;
determining an overall evaluation value of sound quality according to the operation noise information;
acquiring a preset sound quality overall evaluation value;
acquiring sound quality objective parameter information according to the sound quality overall evaluation value and the preset sound quality overall evaluation value;
determining semantic expression characteristic information of the sound quality parameters according to the sound quality objective parameter information;
determining an objective sound quality parameter upper limit value and an objective sound quality parameter lower limit value according to the semantic expression characteristic information of the sound quality parameters;
acquiring a sound quality objective parameter limit distribution curve according to the sound quality objective parameter information, the sound quality objective parameter upper limit value and the sound quality objective parameter lower limit value;
determining objective parameter information of the sound quality to be optimized according to the objective parameter information of the sound quality and the objective parameter limit value distribution curve of the sound quality;
determining optimization information according to the objective parameter information of the sound quality to be optimized;
and adjusting the objective parameter information of the sound quality to be optimized according to the optimization information to finish the sound quality evaluation.
2. The engine sound quality evaluation method according to claim 1, characterized by further comprising, after acquiring the operation noise information of the engine:
Screening according to the running noise information to obtain noise data to be evaluated;
acquiring subjective evaluation information of sound quality according to the noise data to be evaluated;
and acquiring the objective evaluation information of the sound quality according to the subjective evaluation information of the sound quality.
3. The engine sound quality evaluation method according to claim 1, wherein acquiring sound quality objective parameter information from the sound quality overall evaluation value and the preset sound quality overall evaluation value comprises:
judging whether the overall evaluation value of the sound quality is smaller than the preset overall evaluation value of the sound quality;
if yes, obtaining objective parameter information of sound quality;
if not, the sound quality evaluation is completed.
4. The engine sound quality evaluation method according to claim 1, wherein acquiring a sound quality objective parameter limit distribution curve from the sound quality objective parameter information, the sound quality objective parameter upper limit value, and the sound quality objective parameter lower limit value, comprises:
acquiring a first preset conversion proportion and a second preset conversion proportion corresponding to the sound quality objective parameter information;
and acquiring an acoustic quality objective parameter limit distribution curve according to the acoustic quality objective parameter information, the first preset conversion proportion, the second preset conversion proportion, the acoustic quality objective parameter upper limit and the acoustic quality objective parameter lower limit.
5. The method according to claim 4, further comprising, before determining the objective parameter information of the sound quality to be optimized based on the objective parameter information of the sound quality and the objective parameter limit distribution curve of the sound quality:
and obtaining normalized sound quality objective parameter information according to the sound quality objective parameter information, the first preset conversion proportion and the second preset conversion proportion.
6. The engine sound quality evaluation method according to claim 5, wherein normalized sound quality objective parameter information is obtained from the sound quality objective parameter information, the first preset conversion ratio, and the second preset conversion ratio based on a first formula:
；
wherein H is i Objective parameter information for normalizing sound quality; x is X i Objective parameter information for sound quality; a is that i The conversion ratio is a first preset conversion ratio; b (B) i The conversion ratio is a second preset.
7. The engine sound quality evaluation method according to claim 1, wherein determining sound quality objective parameter information to be optimized from the sound quality objective parameter information and the sound quality objective parameter limit value distribution curve includes:
Judging whether the sound quality objective parameter information is positioned in the distribution range of the sound quality objective parameter limit value distribution curve or not;
if yes, the sound quality objective parameter information is considered to be in a normal range;
if not, determining objective parameter information of the sound quality to be optimized.
8. The engine sound quality evaluation method according to claim 1, wherein determining optimization information according to the objective parameter information of sound quality to be optimized comprises:
acquiring frequency characteristic analysis information, subjective return visit confirmation information and noise source identification information of an acoustic camera according to the objective parameter information of the sound quality to be optimized;
and determining optimization information according to the frequency characteristic analysis information, the subjective return visit confirmation information and the noise source identification information of the acoustic camera.
9. An engine sound quality evaluation device comprising the engine sound quality evaluation method according to any one of claims 1 to 8, the engine sound quality evaluation device comprising:
the running noise information acquisition module is used for acquiring the running noise information of the engine;
the sound quality overall evaluation value determining module is used for determining a sound quality overall evaluation value according to the running noise information;
The preset sound quality overall evaluation value acquisition module is used for acquiring a preset sound quality overall evaluation value;
the sound quality objective parameter information acquisition module is used for acquiring sound quality objective parameter information according to the sound quality overall evaluation value and the preset sound quality overall evaluation value;
the sound quality parameter semantic expression characteristic information determining module is used for determining sound quality parameter semantic expression characteristic information according to the sound quality objective parameter information;
the sound quality objective parameter upper limit value and sound quality objective parameter lower limit value determining module is used for determining a sound quality objective parameter upper limit value and a sound quality objective parameter lower limit value according to the sound quality parameter semantic expression characteristic information;
the sound quality objective parameter limit value distribution curve acquisition module is used for acquiring a sound quality objective parameter limit value distribution curve according to the sound quality objective parameter information, the sound quality objective parameter upper limit value and the sound quality objective parameter lower limit value;
the to-be-optimized sound quality objective parameter information determining module is used for determining to-be-optimized sound quality objective parameter information according to the sound quality objective parameter information and the sound quality objective parameter limit value distribution curve;
the optimization information determining module is used for determining optimization information according to the objective parameter information of the sound quality to be optimized;
And the objective parameter information adjustment module for the sound quality to be optimized is used for adjusting the objective parameter information of the sound quality to be optimized according to the optimization information to finish the sound quality evaluation.
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