CN115086851A - Human ear bone conduction transfer function measuring method, device, terminal equipment and medium - Google Patents
Human ear bone conduction transfer function measuring method, device, terminal equipment and medium Download PDFInfo
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- CN115086851A CN115086851A CN202210509726.2A CN202210509726A CN115086851A CN 115086851 A CN115086851 A CN 115086851A CN 202210509726 A CN202210509726 A CN 202210509726A CN 115086851 A CN115086851 A CN 115086851A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04R29/00—Monitoring arrangements; Testing arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/001—Monitoring arrangements; Testing arrangements for loudspeakers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
- H04R2460/13—Hearing devices using bone conduction transducers
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Abstract
The invention discloses a method, a device, terminal equipment and a medium for measuring a human ear bone conduction transfer function, which are used for measuring a human ear bone conduction transfer function by acquiring a frequency point to be tested; playing a first audio signal through a bone conduction headset, and adjusting the frequency point of the first audio signal to the frequency point to be tested; playing a second audio signal through an in-ear earphone, wherein the frequency point of the second audio signal corresponds to the frequency point of the first audio signal; adjusting the phase and amplitude of the second audio signal respectively, and determining a second frequency domain signal corresponding to the frequency point to be tested of the in-ear earphone; and measuring a transfer function of the in-ear earphone, and calculating a bone conduction transfer function corresponding to the frequency point to be tested according to the transfer function of the in-ear earphone and the second frequency domain signal. The bone conduction transfer function of the bone conduction earphone is indirectly calculated by the second frequency domain signal and the transfer function of the in-ear earphone at the frequency point to be tested, so that the accuracy of the measurement result of the bone conduction transfer function of the human ear is improved.
Description
Technical Field
The invention relates to the technical field of hearing devices, in particular to a method and a device for measuring a human ear bone conduction transfer function, terminal equipment and a medium.
Background
With the development of the technology, bone conduction hearing devices are gradually applied to the fields of consumer markets, medical hearing aids, military equipment and the like, and the bone conduction transfer function measurement and calculation technology for sound is a key technology for making bone conduction earphones and bone conduction hearing aids.
In the related art, the bone conduction transfer function is determined indirectly mainly through the air conduction transfer function of the air conduction earphone or the sound, but when the sound is used as a sound source to test the bone conduction transfer function, the vibration of sound waves emitted by the sound can influence the vibration of the bone conduction earphone to a certain extent, and particularly in a low-frequency band, the test error is large.
Therefore, there is a need to provide a solution for improving the accuracy of the measurement result of the human ear bone conduction transfer function.
Disclosure of Invention
The invention mainly aims to provide a method, a device, a terminal device and a medium for measuring a human ear bone conduction transfer function, and aims to improve the accuracy of a measurement result of the human ear bone conduction transfer function.
In order to achieve the above object, the present invention provides a method for measuring a human ear bone conduction transfer function, comprising:
acquiring a frequency point to be tested;
playing a first audio signal through a bone conduction earphone, and adjusting the frequency point of the first audio signal to the frequency point to be tested;
playing a second audio signal through an in-ear earphone, wherein the frequency point of the second audio signal corresponds to the frequency point of the first audio signal;
adjusting the phase and amplitude of the second audio signal respectively, and determining a second frequency domain signal corresponding to the frequency point to be tested of the in-ear earphone;
and measuring the transfer function of the in-ear earphone, and calculating the bone conduction transfer function corresponding to the frequency point to be tested according to the transfer function of the in-ear earphone and the second frequency domain signal.
Optionally, the step of obtaining the frequency point to be tested includes:
determining a frequency point distribution range and an emphasis range of the first audio signal;
selecting a basic frequency point from the distribution range according to the logarithmic characteristic;
selecting an increase frequency point from the emphasis range;
and taking the basic frequency point and the increased frequency points as frequency points of the bone conduction headset, wherein the frequency points comprise the frequency points to be tested.
Optionally, the step of playing the first audio signal through a bone conduction headset and adjusting the frequency point of the first audio signal to the frequency point to be tested further includes:
adjusting the phase of the first audio signal to a first phase;
adjusting the amplitude of the first audio signal to a first amplitude, wherein the first audio signal corresponding to the first amplitude reaches a first volume threshold;
and recording the first phase and the first amplitude as a first frequency domain signal corresponding to the frequency point to be tested of the bone conduction headset.
Optionally, the step of adjusting the phase and the amplitude of the second audio signal respectively to determine a second frequency domain signal corresponding to the frequency point to be tested by the in-ear headphone comprises:
adjusting the phase of the second audio signal to a second phase, wherein the second audio signal corresponding to the second phase reaches a second volume threshold;
adjusting the amplitude of the second audio signal to a second amplitude, wherein the second audio signal corresponding to the second amplitude reaches a third volume threshold;
and recording the second phase and the second amplitude as a second frequency domain signal corresponding to the frequency point to be tested of the in-ear earphone.
Optionally, the step of measuring a transfer function of the in-ear headphone, and calculating a bone conduction transfer function corresponding to the frequency point to be tested according to the transfer function of the in-ear headphone and the second frequency domain signal includes:
measuring a transfer function of the in-ear headphone by electroacoustic;
and calculating the bone conduction transfer function corresponding to the frequency point to be tested according to the transfer function of the in-ear earphone, the first frequency domain signal and the second frequency domain signal.
Optionally, the step of measuring a transfer function of the in-ear headphone, and calculating a bone conduction transfer function corresponding to the frequency point to be tested according to the transfer function of the in-ear headphone, the first phase, and the first amplitude further includes:
traversing each frequency point of the bone conduction headset, and calculating a bone conduction transfer function corresponding to each frequency point to obtain a preliminary bone conduction transfer function of the bone conduction headset.
Optionally, the step of traversing each frequency point, calculating a bone conduction transfer function corresponding to each frequency point, and obtaining a preliminary bone conduction transfer function of the bone conduction headset further includes:
measuring a preliminary bone conduction transfer function obtained by wearing the bone conduction earphone by a plurality of users;
and obtaining an accurate bone conduction transfer function of the bone conduction earphone according to the preliminary bone conduction transfer function corresponding to each user.
In addition, to achieve the above object, the present invention also provides a human ear bone conduction transfer function measuring apparatus including:
the acquisition module is used for acquiring the frequency points to be tested;
the first playing module is used for playing a first audio signal through a bone conduction headset and adjusting the frequency point of the first audio signal to the frequency point to be tested;
the second playing module is used for playing a second audio signal through an in-ear earphone, wherein the frequency point of the second audio signal corresponds to the frequency point of the first audio signal;
the adjusting module is used for respectively adjusting the phase and the amplitude of the second audio signal and determining a second frequency domain signal corresponding to the frequency point to be tested of the in-ear earphone;
and the calculation module is used for measuring the transfer function of the in-ear earphone and calculating the bone conduction transfer function corresponding to the frequency point to be tested according to the transfer function of the in-ear earphone and the second frequency domain signal.
In addition, to achieve the above object, the present invention further provides a terminal device, which includes a memory, a processor and a human ear bone conduction transfer function measurement program stored in the memory and operable on the processor, wherein the human ear bone conduction transfer function measurement program, when executed by the processor, implements the steps of the human ear bone conduction transfer function measurement method as described above.
Further, to achieve the above object, the present invention also provides a computer readable storage medium having stored thereon a human ear bone conduction transfer function measurement program, which when executed by a processor, implements the steps of the human ear bone conduction transfer function measurement method as described above.
The embodiment of the invention provides a method, a device, a terminal device and a medium for measuring a human ear bone conduction transfer function, which are characterized in that a frequency point to be tested is obtained; playing a first audio signal through a bone conduction earphone, and adjusting the frequency point of the first audio signal to the frequency point to be tested; playing a second audio signal through an in-ear earphone, wherein the frequency point of the second audio signal corresponds to the frequency point of the first audio signal; adjusting the phase and amplitude of the second audio signal respectively, and determining a second frequency domain signal corresponding to the frequency point to be tested of the in-ear earphone; and measuring the transfer function of the in-ear earphone, and calculating the bone conduction transfer function corresponding to the frequency point to be tested according to the transfer function of the in-ear earphone and the second frequency domain signal. According to the second frequency domain signal and the transfer function of the in-ear earphone at the frequency point to be tested, the bone conduction transfer function of the bone conduction earphone is indirectly calculated, the accuracy of the measurement result of the bone conduction transfer function of the ear of a human is improved, the signal does not need to be acquired in the ear canal, complex acquisition equipment does not need to be adopted, and the method is convenient and easy to operate.
Drawings
Fig. 1 is a functional block diagram of a terminal device to which an ear bone conduction transfer function measuring apparatus of the present invention belongs;
FIG. 2 is a schematic flow chart illustrating an exemplary embodiment of a method for measuring an ear bone conduction transfer function according to the present invention;
fig. 3 is a detailed flowchart of step S50 in the embodiment of fig. 2.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The main solution of the embodiment of the invention is as follows: obtaining a frequency point to be tested; playing a first audio signal through a bone conduction earphone, and adjusting the frequency point of the first audio signal to the frequency point to be tested; playing a second audio signal through an in-ear earphone, wherein the frequency point of the second audio signal corresponds to the frequency point of the first audio signal; adjusting the phase and amplitude of the second audio signal respectively, and determining a second frequency domain signal corresponding to the frequency point to be tested of the in-ear earphone; and measuring the transfer function of the in-ear earphone, and calculating the bone conduction transfer function corresponding to the frequency point to be tested according to the transfer function of the in-ear earphone and the second frequency domain signal. According to the second frequency domain signal and the transfer function of the in-ear earphone at the frequency point to be tested, the bone conduction transfer function of the bone conduction earphone is indirectly calculated, the accuracy of the measurement result of the bone conduction transfer function of the ear of a human is improved, the signal does not need to be acquired in the ear canal, complex acquisition equipment does not need to be adopted, and the method is convenient and easy to operate.
The bone conduction transfer function is also called bone conduction transfer function, and the measurement and calculation technology of the bone conduction transfer function of sound is a key technology for making bone conduction earphones and bone conduction hearing aids. Low-end bone conduction earphones and bone conduction hearing aids often do not take the bone conduction transfer function of sound into account and therefore it is difficult to achieve good results.
The air conduction transfer function of sound can be measured directly through the air-acoustic propagation path using a simulated ear microphone, whereas the bone conduction transfer function is difficult to measure directly. Since the bone passage around the human ear is complicated and difficult to simulate, even if a bone conduction test sensor (vibration sensor, accelerometer) is added on the test instrument, the function of picking up the vibration signal of a bone conduction earphone and a bone conduction hearing aid can only be achieved, and the function of testing the transfer function cannot be achieved.
The bone conduction transfer function can be obtained by indirect measurement. When measuring the bone conduction earphone, the bone conduction transfer function can be indirectly calculated by measuring the air conduction transfer function of the air conduction earphone or the sound equipment which can sound at the same time. However, when the sound is used as a sound source to test the bone conduction transfer function, the vibration of the sound wave emitted by the sound affects the vibration of the bone conduction earphone to a certain extent, and especially in a low-frequency band, the vibration of the low-frequency sound emitted by the sound is transmitted into a bone conduction path through skin and bones to form crosstalk, so that the test error is large.
Most of the existing methods for measuring and calculating the bone conduction transfer function need to acquire an ear sound signal or acquire a signal in an ear canal. The acquisition equipment used by the acquisition mode is complex, harsh in condition, strong in invasion to the tested person, complex in involved signal processing process, high in cost and inconvenient to operate.
The invention provides a solution, which is used for measuring the bone conduction hearing aid transfer function through a convenient and efficient method, reduces the use of instruments and equipment, and simultaneously improves the accuracy of the measurement result of the bone conduction transfer function of the human ear.
Specifically, referring to fig. 1, fig. 1 is a functional block diagram of a terminal device to which the ear bone conduction transfer function measuring apparatus of the present invention belongs. The human ear bone conduction transfer function measuring device can be a device which is independent of the terminal equipment and can measure the human ear bone conduction transfer function, and the device can be borne on the terminal equipment in a hardware or software mode. The terminal device can be an intelligent mobile terminal with a data processing function, such as a mobile phone and a tablet personal computer, and can also be a fixed terminal device or a server with a data processing function.
In this embodiment, the terminal device to which the human ear bone conduction transfer function measuring apparatus belongs at least includes an output module 110, a processor 120, a memory 130 and a communication module 140.
The memory 130 stores an operating system and a human ear bone conduction transfer function measurement program, and the human ear bone conduction transfer function measurement device can store the obtained frequency point to be tested, a second frequency domain signal of the in-ear earphone corresponding to the frequency point to be tested, a measured transfer function of the in-ear earphone, a bone conduction transfer function corresponding to the frequency point to be tested calculated according to the transfer function of the in-ear earphone and the second frequency domain signal, and the like in the memory 130; the output module 110 may be a display screen or the like. The communication module 140 may include a WIFI module, a mobile communication module, a bluetooth module, and the like, and communicates with an external device or a server through the communication module 140.
Wherein, the human ear bone conduction transfer function measurement program in the memory 130 realizes the following steps when being executed by the processor:
acquiring a frequency point to be tested;
playing a first audio signal through a bone conduction earphone, and adjusting the frequency point of the first audio signal to the frequency point to be tested;
playing a second audio signal through an in-ear earphone, wherein the frequency point of the second audio signal corresponds to the frequency point of the first audio signal;
adjusting the phase and amplitude of the second audio signal respectively, and determining a second frequency domain signal corresponding to the frequency point to be tested of the in-ear earphone;
and measuring the transfer function of the in-ear earphone, and calculating the bone conduction transfer function corresponding to the frequency point to be tested according to the transfer function of the in-ear earphone and the second frequency domain signal.
Further, the human ear bone conduction transfer function measurement program in the memory 130 when executed by the processor further implements the steps of:
determining a frequency point distribution range and an emphasis range of the first audio signal;
selecting a basic frequency point from the distribution range according to the logarithmic characteristic;
selecting an increase frequency point from the emphasis range;
and taking the basic frequency point and the increased frequency points as frequency points of the bone conduction headset, wherein the frequency points comprise the frequency points to be tested.
Further, the human ear bone conduction transfer function measurement program in the memory 130 when executed by the processor further implements the steps of:
adjusting the phase of the first audio signal to a first phase;
adjusting the amplitude of the first audio signal to a first amplitude, wherein the first audio signal corresponding to the first amplitude reaches a first volume threshold;
and recording the first phase and the first amplitude as a first frequency domain signal corresponding to the frequency point to be tested of the bone conduction headset.
Further, the human ear bone conduction transfer function measurement program in the memory 130 when executed by the processor further implements the steps of:
adjusting the phase of the second audio signal to a second phase, wherein the second audio signal corresponding to the second phase reaches a second volume threshold;
adjusting the amplitude of the second audio signal to a second amplitude, wherein the second audio signal corresponding to the second amplitude reaches a third volume threshold;
and recording the second phase and the second amplitude as a second frequency domain signal corresponding to the frequency point to be tested of the in-ear earphone.
Further, the human ear bone conduction transfer function measurement program in the memory 130 when executed by the processor further implements the steps of:
measuring a transfer function of the in-ear headphone by electroacoustic;
and calculating the bone conduction transfer function corresponding to the frequency point to be tested according to the transfer function of the in-ear earphone, the first frequency domain signal and the second frequency domain signal.
Further, the human ear bone conduction transfer function measurement program in the memory 130 when executed by the processor further implements the steps of:
and traversing each frequency point of the bone conduction headset, and calculating a bone conduction transfer function corresponding to each frequency point to obtain a preliminary bone conduction transfer function of the bone conduction headset.
Further, the human ear bone conduction transfer function measurement program in the memory 130 when executed by the processor further implements the steps of:
measuring a preliminary bone conduction transfer function obtained by wearing the bone conduction headset by a plurality of users;
and obtaining an accurate bone conduction transfer function of the bone conduction earphone according to the preliminary bone conduction transfer function corresponding to each user.
According to the scheme, the frequency point to be tested is obtained; playing a first audio signal through a bone conduction earphone, and adjusting the frequency point of the first audio signal to the frequency point to be tested; playing a second audio signal through an in-ear earphone, wherein the frequency point of the second audio signal corresponds to the frequency point of the first audio signal; adjusting the phase and amplitude of the second audio signal respectively, and determining a second frequency domain signal corresponding to the frequency point to be tested by the in-ear earphone; and measuring the transfer function of the in-ear earphone, and calculating the bone conduction transfer function corresponding to the frequency point to be tested according to the transfer function of the in-ear earphone and the second frequency domain signal. According to the second frequency domain signal and the transfer function of the in-ear earphone at the frequency point to be tested, the bone conduction transfer function of the bone conduction earphone is indirectly calculated, the accuracy of the measurement result of the bone conduction transfer function of the ear of a human is improved, the signal does not need to be acquired in the ear canal, complex acquisition equipment does not need to be adopted, and the method is convenient and easy to operate.
Based on the above terminal device architecture but not limited to the above architecture, embodiments of the method of the present invention are presented.
The main body of the method of the present embodiment may be a human ear bone conduction transfer function measuring apparatus or a terminal device, for example.
Referring to fig. 2, fig. 2 is a flow chart of an exemplary embodiment of the method for measuring the ear bone conduction transfer function of the present invention. The human ear bone conduction transfer function measuring method comprises the following steps:
step S10, acquiring a frequency point to be tested;
determining a frequency point distribution range and an emphasis range of the first audio signal;
selecting a basic frequency point from the distribution range according to the logarithmic characteristic;
selecting an increase frequency point from the emphasis range;
and taking the basic frequency point and the increased frequency points as frequency points of the bone conduction headset, wherein the frequency points comprise the frequency points to be tested.
Specifically, in the embodiment of the invention, a person with normal hearing is selected as a measurer, the measurer correctly wears a bone conduction earphone or a bone conduction hearing aid and other hearing devices needing to measure a bone conduction transfer function by one ear, the bone conduction hearing device plays a first audio signal, and as the distribution range of audio frequency points which can be perceived by the ears of the person is 20Hz-20kHz and the perception of sound conforms to the logarithmic characteristic, points are taken from 20Hz-20kHz according to the logarithmic characteristic and are appropriately added in an emphasis range, for example, the testing range of the hearing aid is 200Hz-8kHz, as one implementation mode, the frequency points are emphasized in the range of 200Hz-8 kHz.
Step S20, playing a first audio signal through a bone conduction headset, and adjusting the frequency point of the first audio signal to the frequency point to be tested;
after the frequency point to be tested is obtained, the first audio signal S can be played through the bone conduction earphone 1 (n)。S 1 The (n) signal is a frequency domain discrete signal with a finite length L, where n is 1,2,3 …, L. S 1 (n) as frequency domain signal, including frequency, phase and amplitude information, e.g. S 1 (1) Has a frequency of 20Hz, a phase of 0deg and an amplitude of-15 dBFS. And adjusting the frequency point of the first audio signal to the frequency point to be tested, and the method further comprises the following steps:
adjusting the phase of the first audio signal to a first phase;
adjusting the amplitude of the first audio signal to a first amplitude, wherein the first audio signal corresponding to the first amplitude reaches a first volume threshold;
and recording the first phase and the first amplitude as a first frequency domain signal corresponding to the frequency point to be tested of the bone conduction headset.
In particular, the first audio signal S 1 The phase and amplitude of (n) are fixed, in the embodiment of the invention, the phase is uniformly fixed to 0deg, the amplitude of the signal is ensured to be heard by normal human ears after being transmitted from a bone conduction earphone (hearing aid), and the selection range is generally-10 dBFS to-20 dBFS.
Step S30, playing a second audio signal through an in-ear earphone, wherein the frequency point of the second audio signal corresponds to the frequency point of the first audio signal;
further, the second audio signal may be played through an in-ear headphone, and before that, the in-ear headphone needs to be worn on a single ear where the bone conduction headphone is located.
Specifically, wear an in-ear earphone in the monaural side of wearing the bone conduction earphone, in this process, need to ensure as far as possible that in-ear earphone and bone conduction earphone are contactless as far as possible, can adopt soft sealed silica gel cover or sponge cover simultaneously, reduce the vibration to outer ear canal bone system. The in-ear headphones may take the form of an air conduction hearing aid, connected by a conduit. If the contact with the current bone conduction headset cannot be avoided, the soft and light silica gel as much as possible is used for separating the bone conduction headset from the current bone conduction headset, and the mutual influence of the bone conduction headset and the silica gel is avoided as much as possible.
And playing a second audio signal through the in-ear earphone, wherein the frequency point of the second audio signal corresponds to the frequency point of the first audio signal, and the amplitude and the phase of the second audio signal can be adjusted.
Step S40, adjusting the phase and amplitude of the second audio signal respectively, and determining a second frequency domain signal corresponding to the frequency point to be tested by the in-ear earphone;
adjusting the phase of the second audio signal to a second phase, wherein the second audio signal corresponding to the second phase reaches a second volume threshold;
adjusting the amplitude of the second audio signal to a second amplitude, wherein the second audio signal corresponding to the second amplitude reaches a third volume threshold;
and recording the second phase and the second amplitude as a second frequency domain signal corresponding to the frequency point to be tested of the in-ear earphone.
After the frequency point of the second audio signal is adjusted to the frequency point to be tested, firstly, the bone conduction headset is kept to play the first audio signal without interruption, then, the in-ear headset is used for playing the second audio signal, the phase position of the second audio signal is adjusted, the sound heard by a measurer is minimum, the current phase position is further fixed, then, the amplitude of the second audio signal is continuously adjusted, the sound heard by the measurer is not heard or is minimum, then, the amplitude and the phase position of the second audio signal at the moment are recorded and are used as a second frequency domain signal corresponding to the in-ear headset at the frequency point to be tested, and the second frequency domain signal is used for calculating the transfer function of the subsequent bone conduction headset.
Step S50, measuring a transfer function of the in-ear headphone, and calculating a bone conduction transfer function corresponding to the first frequency point according to the transfer function of the in-ear headphone, the first phase, and the first amplitude.
Furthermore, after the amplitude and the phase of the second audio signal are adjusted, the transfer function of the in-ear earphone can be obtained through electroacoustic measurement to calculate the bone conduction transfer function corresponding to the frequency point to be tested of the bone conduction earphone, and in addition, the method further comprises the following steps:
and traversing each frequency point of the bone conduction headset, and calculating a bone conduction transfer function corresponding to each frequency point to obtain a preliminary bone conduction transfer function of the bone conduction headset.
By analogy, traversing each frequency point of the selected bone conduction earphone so as to obtain a bone conduction transfer function corresponding to each frequency point, taking a set formed by the bone conduction transfer functions corresponding to each frequency point as a primary bone conduction transfer function, and further comprising the following steps:
measuring a preliminary bone conduction transfer function obtained by wearing the bone conduction earphone by a plurality of users;
and obtaining an accurate bone conduction transfer function of the bone conduction earphone according to the preliminary bone conduction transfer function corresponding to each user.
In order to further improve the accuracy of the measurement result of the bone conduction transfer function of the bone conduction earphone, the accurate bone conduction transfer function of the current bone conduction earphone can be obtained by measuring the preliminary bone conduction transfer function obtained by wearing the bone conduction earphone by a plurality of subjects and further carrying out average approximation on the obtained result.
In the embodiment, the frequency point to be tested is obtained; playing a first audio signal through a bone conduction earphone, and adjusting the frequency point of the first audio signal to the frequency point to be tested; playing a second audio signal through an in-ear earphone, wherein the frequency point of the second audio signal corresponds to the frequency point of the first audio signal; adjusting the phase and amplitude of the second audio signal respectively, and determining a second frequency domain signal corresponding to the frequency point to be tested of the in-ear earphone; and measuring the transfer function of the in-ear earphone, and calculating the bone conduction transfer function corresponding to the frequency point to be tested according to the transfer function of the in-ear earphone and the second frequency domain signal. According to the second frequency domain signal and the transfer function of the in-ear earphone at the frequency point to be tested, the bone conduction transfer function of the bone conduction earphone is indirectly calculated, the accuracy of the measurement result of the bone conduction transfer function is improved, signals do not need to be collected in the auditory canal, complex collection equipment does not need to be adopted, and the method is convenient and easy to operate.
Referring to fig. 3, fig. 3 is a schematic specific flowchart of step S50 in the embodiment of fig. 2. This embodiment is based on the embodiment shown in fig. 2, and in this embodiment, the step S50 includes:
step S501, measuring a transfer function of the in-ear earphone through an electroacoustic mode;
specifically, at the frequency point N to be tested,has S 1 (N)H air (N)＝-S 2 (N)H bone (N) wherein H is air (N) is the transfer function of the in-ear earphone, the transfer function H air The measurement method (N) is common, for example, in a anechoic room or a listening room, an in-ear earphone is worn on a silica gel simulation ear of a head and a trunk simulator (commonly called an artificial head), the earphone can be obtained by playing a sweep frequency signal and measuring the sweep frequency signal by using a microphone built in the simulation ear, and thus the transfer function H is obtained air (N) substituting into a formula for calculation of the bone conduction transfer function of the frequency point to be tested.
Step S502, calculating a bone conduction transfer function corresponding to the frequency point to be tested according to the transfer function of the in-ear earphone, the first frequency domain signal and the second frequency domain signal.
Further, as the frequency point N to be tested has S 1 (N)H air (N)＝-S 2 (N)H bone (N) wherein S 1 (N) as a frequency domain signal, S, with frequency, phase and amplitude fixed in advance 2 Frequency of (N) and S 1 (N) same, the amplitude and phase of which are adjusted and recorded, so that S 1 (N) and S 2 (N) is known, transfer function H of in-ear headphones air (N) is obtained by electroacoustic measurement, so that the bone conduction transfer function H of the frequency point to be tested can be quickly determined bone (N) is provided. And then the bone conduction transfer function of the bone conduction earphone at each frequency point can be calculated by a similar method.
In the embodiment, by the above scheme, the transfer function of the in-ear earphone is measured by electroacoustic; and calculating the bone conduction transfer function corresponding to the frequency point to be tested according to the transfer function of the in-ear earphone, the first frequency domain signal and the second frequency domain signal. Based on the transfer function of the in-ear earphone, the functional relation between the first frequency domain signal and the second frequency domain signal, the bone conduction transfer function of the bone conduction earphone is indirectly obtained by measuring the transfer function of the in-ear earphone, signals do not need to be collected in the auditory canal, complex collection equipment does not need to be adopted, and the method is convenient and easy to operate.
In addition, an embodiment of the present invention further provides a human ear bone conduction transfer function measurement apparatus, where the human ear bone conduction transfer function measurement apparatus includes:
the acquisition module is used for acquiring the frequency points to be tested;
the first playing module is used for playing a first audio signal through a bone conduction headset and adjusting the frequency point of the first audio signal to the frequency point to be tested;
the second playing module is used for playing a second audio signal through an in-ear earphone, wherein the frequency point of the second audio signal corresponds to the frequency point of the first audio signal;
the adjusting module is used for respectively adjusting the phase and the amplitude of the second audio signal and determining a second frequency domain signal corresponding to the frequency point to be tested of the in-ear earphone;
and the calculation module is used for measuring the transfer function of the in-ear earphone and calculating the bone conduction transfer function corresponding to the frequency point to be tested according to the transfer function of the in-ear earphone and the second frequency domain signal.
Because the wearing modes of different users, the bone density and the conductivity of the bone system around the ear and the hearing loss condition are different, the method for measuring the bone conduction transfer function of the ear of the human in the embodiment of the invention can be applied to matched software for correcting the transfer function of the bone conduction hearing aid to obtain better hearing effect, and the specific application steps comprise:
(1) a user correctly wears a bone conduction hearing aid, and the hearing aid is connected with a mobile phone or a computer through Bluetooth;
(2) and opening corresponding software, and carrying out hearing adaptation test on the user by using signals of partial frequency points. In the present embodiment, the frequency points used are six frequency points of 250Hz, 500Hz, 1kHz, 2kHz, 4kHz, and 8 kHz;
(3) for each frequency point, increasing from the minimum volume until the user can hear, confirming the volume condition when the user stops, and confirming each frequency point three times to improve the confidence coefficient of the data;
(4) and measuring each frequency point, and correcting the transfer function of the bone conduction hearing aid according to the measurement result, thereby obtaining a better hearing aid effect.
In addition, an embodiment of the present invention further provides a terminal device, where the terminal device includes a memory, a processor, and a human ear bone conduction transfer function measurement program that is stored in the memory and is executable on the processor, and when the human ear bone conduction transfer function measurement program is executed by the processor, the steps of the human ear bone conduction transfer function measurement method described above are implemented.
Since the program for measuring the ear bone conduction transfer function of the person is executed by the processor, all technical solutions of all the embodiments are adopted, so that at least all the advantages brought by all the technical solutions of all the embodiments are achieved, and detailed description is omitted.
Furthermore, an embodiment of the present invention further provides a computer-readable storage medium, where a human ear bone conduction transfer function measurement program is stored on the computer-readable storage medium, and when the human ear bone conduction transfer function measurement program is executed by a processor, the steps of the human ear bone conduction transfer function measurement method described above are implemented.
Since the program for measuring the ear bone conduction transfer function of the person is executed by the processor, all technical solutions of all the embodiments are adopted, so that at least all the advantages brought by all the technical solutions of all the embodiments are achieved, and detailed description is omitted.
Compared with the prior art, the method, the device, the terminal equipment and the medium for measuring the human ear bone conduction transfer function provided by the embodiment of the invention acquire the frequency points to be tested; playing a first audio signal through a bone conduction earphone, and adjusting the frequency point of the first audio signal to the frequency point to be tested; playing a second audio signal through an in-ear earphone, wherein the frequency point of the second audio signal corresponds to the frequency point of the first audio signal; adjusting the phase and amplitude of the second audio signal respectively, and determining a second frequency domain signal corresponding to the frequency point to be tested of the in-ear earphone; and measuring the transfer function of the in-ear earphone, and calculating the bone conduction transfer function corresponding to the frequency point to be tested according to the transfer function of the in-ear earphone and the second frequency domain signal. According to the second frequency domain signal and the transfer function of the in-ear earphone at the frequency point to be tested, the bone conduction transfer function of the bone conduction earphone is indirectly calculated, the accuracy of the measurement result of the bone conduction transfer function of the ear of a human is improved, the signal does not need to be acquired in the ear canal, complex acquisition equipment does not need to be adopted, and the method is convenient and easy to operate.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or system in which the element is included.
The above-mentioned serial numbers of the embodiments of the present application are merely for description, and do not represent the advantages and disadvantages of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, a controlled terminal, or a network device) to execute the method of each embodiment of the present application.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A human ear bone conduction transfer function measuring method is characterized by comprising the following steps:
acquiring a frequency point to be tested;
playing a first audio signal through a bone conduction earphone, and adjusting the frequency point of the first audio signal to the frequency point to be tested;
playing a second audio signal through an in-ear earphone, wherein the frequency point of the second audio signal corresponds to the frequency point of the first audio signal;
adjusting the phase and amplitude of the second audio signal respectively, and determining a second frequency domain signal corresponding to the frequency point to be tested of the in-ear earphone;
and measuring the transfer function of the in-ear earphone, and calculating the bone conduction transfer function corresponding to the frequency point to be tested according to the transfer function of the in-ear earphone and the second frequency domain signal.
2. The method for measuring a human ear bone conduction transfer function as claimed in claim 1, wherein the step of obtaining the frequency points to be tested comprises:
determining a frequency point distribution range and an emphasis range of the first audio signal;
selecting a basic frequency point from the distribution range according to the logarithmic characteristic;
selecting an increase frequency point from the emphasis range;
and taking the basic frequency point and the increased frequency points as frequency points of the bone conduction headset, wherein the frequency points comprise the frequency points to be tested.
3. The method for measuring a human ear bone conduction transfer function as claimed in claim 1, wherein the step of playing the first audio signal through a bone conduction headset and adjusting the frequency point of the first audio signal to the frequency point to be tested further comprises:
adjusting the phase of the first audio signal to a first phase;
adjusting the amplitude of the first audio signal to a first amplitude, wherein the first audio signal corresponding to the first amplitude reaches a first volume threshold;
and recording the first phase and the first amplitude as a first frequency domain signal corresponding to the frequency point to be tested of the bone conduction headset.
4. The method for measuring a human ear bone conduction transfer function as claimed in claim 1, wherein the step of adjusting the phase and amplitude of the second audio signal respectively and determining the second frequency domain signal corresponding to the frequency point to be tested by the in-ear headphone comprises:
adjusting the phase of the second audio signal to a second phase, wherein the second audio signal corresponding to the second phase reaches a second volume threshold;
adjusting the amplitude of the second audio signal to a second amplitude, wherein the second audio signal corresponding to the second amplitude reaches a third volume threshold;
and recording the second phase and the second amplitude as a second frequency domain signal corresponding to the frequency point to be tested of the in-ear earphone.
5. The method for measuring a bone conduction transfer function of a human ear according to claim 4, wherein the step of measuring the transfer function of the in-ear earphone and calculating the bone conduction transfer function corresponding to the frequency point to be tested according to the transfer function of the in-ear earphone and the second frequency domain signal comprises:
measuring a transfer function of the in-ear headphone by electroacoustic;
and calculating the bone conduction transfer function corresponding to the frequency point to be tested according to the transfer function of the in-ear earphone, the first frequency domain signal and the second frequency domain signal.
6. The method for measuring a bone conduction transfer function of a human ear according to claim 1, wherein the step of measuring the transfer function of the in-ear earphone and calculating the bone conduction transfer function corresponding to the frequency point to be tested according to the transfer function of the in-ear earphone, the first phase and the first amplitude further comprises:
and traversing each frequency point of the bone conduction headset, and calculating a bone conduction transfer function corresponding to each frequency point to obtain a preliminary bone conduction transfer function of the bone conduction headset.
7. The method of claim 6, wherein the step of traversing each of the frequency points, calculating a bone conduction transfer function corresponding to each of the frequency points, and obtaining a preliminary bone conduction transfer function of the bone conduction headset further comprises:
measuring a preliminary bone conduction transfer function obtained by wearing the bone conduction headset by a plurality of users;
and obtaining an accurate bone conduction transfer function of the bone conduction earphone according to the preliminary bone conduction transfer function corresponding to each user.
8. A human ear bone conduction transfer function measurement apparatus, characterized by comprising:
the acquisition module is used for acquiring frequency points to be tested;
the first playing module is used for playing a first audio signal through a bone conduction headset and adjusting the frequency point of the first audio signal to the frequency point to be tested;
the second playing module is used for playing a second audio signal through an in-ear earphone, wherein the frequency point of the second audio signal corresponds to the frequency point of the first audio signal;
the adjusting module is used for respectively adjusting the phase and the amplitude of the second audio signal and determining a second frequency domain signal corresponding to the frequency point to be tested of the in-ear earphone;
and the calculation module is used for measuring the transfer function of the in-ear earphone and calculating the bone conduction transfer function corresponding to the frequency point to be tested according to the transfer function of the in-ear earphone and the second frequency domain signal.
9. A terminal device, characterized in that the terminal device comprises a memory, a processor and a human ear bone conduction transfer function measurement program stored on the memory and executable on the processor, the human ear bone conduction transfer function measurement program, when executed by the processor, implementing the steps of the human ear bone conduction transfer function measurement method according to any one of claims 1-7.
10. A computer-readable storage medium, characterized in that a human ear bone conduction transfer function measurement program is stored on the computer-readable storage medium, which when executed by a processor implements the steps of the human ear bone conduction transfer function measurement method according to any one of claims 1 to 7.
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| CN113314134A (en) * | 2021-05-11 | 2021-08-27 | 紫光展锐(重庆)科技有限公司 | Bone conduction signal compensation method and device |
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| CN113314134A (en) * | 2021-05-11 | 2021-08-27 | 紫光展锐(重庆)科技有限公司 | Bone conduction signal compensation method and device |
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