WO2014038029A1 - 設備機器音の快音化装置及び設備機器音の快音化方法 - Google Patents
設備機器音の快音化装置及び設備機器音の快音化方法 Download PDFInfo
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- WO2014038029A1 WO2014038029A1 PCT/JP2012/072674 JP2012072674W WO2014038029A1 WO 2014038029 A1 WO2014038029 A1 WO 2014038029A1 JP 2012072674 W JP2012072674 W JP 2012072674W WO 2014038029 A1 WO2014038029 A1 WO 2014038029A1
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- emitting device
- equipment
- pleasant
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K15/00—Acoustics not otherwise provided for
- G10K15/04—Sound-producing devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M21/00—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis
- A61M21/02—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis for inducing sleep or relaxation, e.g. by direct nerve stimulation, hypnosis, analgesia
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/1752—Masking
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M21/00—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis
- A61M2021/0005—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis by the use of a particular sense, or stimulus
- A61M2021/0027—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis by the use of a particular sense, or stimulus by the hearing sense
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2230/00—Measuring parameters of the user
- A61M2230/04—Heartbeat characteristics, e.g. ECG, blood pressure modulation
- A61M2230/06—Heartbeat rate only
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
- F24F11/66—Sleep mode
Definitions
- the present invention relates to a device for making a pleasant sound of facility equipment sound and a method for making a sound of equipment equipment sound capable of making a vibration sound (noise) generated from the equipment (for example, home appliances) pleasant.
- a means for storing dedicated contents such as music in an electrical storage means and collecting unpleasant sounds with electric signals and then releasing the dedicated contents from a speaker or the like to make unpleasant sounds difficult to hear.
- Active noise control is required because high-accuracy real-time processing requires high-accuracy circuits and high-accuracy circuits.
- Active noise control such as Active Noise Control
- ANC Active noise control
- a circuit configuration including peripheral circuits necessary for signal processing is constructed, the result is a high cost requirement.
- sound emission means such as a speaker with a dedicated acoustic design is required. There is no cost and space environment to install.
- the present invention has been made in order to cope with the above-described problems, and is based on the subjective and physiological response evaluations of consumers, and is a facility for making vibration noise (noise) generated from home appliances pleasant. It is an object of the present invention to provide a device for making a sound of equipment sound and a method for making a sound of equipment sound.
- the equipment sound-reducing device is a sound-reducing device that makes a sound generated from a device that drives a driving component pleasant using a temporal frequency variation characteristic of a sound generated in nature.
- Filter processing so as to suppress a portion of the frequency component of the temporal frequency variation characteristic of the sound generated in the natural world that matches or approximates the eigenvalue of the casing of the device on which the driving component is mounted.
- evaluating the signal based on the filtered variation characteristics based on human subjective and physiological responses to sounds generated in nature when the driving component is operated, and evaluating the human subjective and physiological responses Based on the result, a signal based on the filtered variation characteristic is selected, and an operation signal for the drive component is created based on the selected signal.
- the pleasant sounding method for facility equipment sound is a pleasant sounding method for making a sound generated from a device that operates a drive component using a temporal frequency variation characteristic of a sound generated in nature. Then, the frequency component of the variation characteristic of the temporal frequency of the sound that occurs in the natural world is processed by suppressing the portion that matches or approximates the eigenvalue of the casing of the device on which the driving component is mounted, The signal based on the fluctuation characteristics of the processed frequency is evaluated based on the human subjective and physiological responses to the sound generated in nature when the driving component is operated, and the human subjective and physiological response evaluation results are obtained.
- a signal based on the processed variation characteristic is selected, and an operation signal for the driving component is created based on the selected signal, and a human average heart rate obtained in advance with a sound pressure level and period of a natural sound. Number It is intended to emit a sound that was adjusted have as additional sound source.
- the driving parts such as the motor and the fan can be operated by the “quiet sounding waveform” created based on the subjective and physiological response evaluation results of the user. Therefore, according to the pleasant sounding device for equipment according to the present invention, it is possible to generate an acoustic characteristic that is determined to be “pleasant” for humans.
- the pleasant sounding method for equipment it is possible not only to generate an acoustic characteristic that is judged to be “pleasant” for humans, but also to deal with housing vibration noise and sound at a time axis level. Sleep induction and coolness adjustment using the change in characteristics, and further warmth adjustment can be performed.
- FIG. FIG. 1 is a schematic diagram for explaining the outline of the equipment sound generating device (hereinafter simply referred to as the sound generating device A) according to Embodiment 1 of the present invention.
- the pleasant sound device A is used for an indoor unit 110 of an air conditioner that is an example of equipment.
- the pleasant sound device A is used in equipment that rotates a driving component such as a motor or a fan with a non-stationary signal using a periodic signal and a temporal variation characteristic of the natural world, and the subjective and physiological responses of consumers (users).
- the driving parts are operated by the “quiet sound waveform” based on the evaluation, and the unpleasant sound is made pleasant.
- the pleasant sound device A stores a natural sound time axis-input voltage waveform example 100 (hereinafter referred to as a natural waveform example 100).
- the pleasant sound device A includes a filter processing unit 101 that performs a filter process according to the frequency characteristics of the natural world waveform example 100.
- the pleasant sound device A can store a time axis-input voltage waveform example 102 (hereinafter referred to as a post-processing waveform example 102) after being filtered by the filter processing unit 101.
- the natural world waveform example 100 shows, for example, a fluctuation state when a flow of “wind” generated in the natural world is picked up by a microphone or the like for an arbitrary time.
- Factors such as “wind” are pressure fluctuations and have frequency components. Therefore, since a pressure fluctuation is originally measured with a microphone for acoustic measurement or the like, a pressure change such as “wind” can be measured using the microphone or the like. For this reason, measurement with a microphone in nature can be referred to as “sound” measurement including “wind” measurement.
- the filter processing unit 101 performs a function of changing characteristics such as a period and a protrusion amount associated with the frequency characteristics of the natural waveform example 100.
- An acoustic processing item necessary for improvement at that time is a filter process for changing characteristics such as a period and a protrusion amount. Specifically, in the filtering process, the frequency component of the temporal frequency variation characteristic of the sound that occurs in nature is suppressed so as not to match or approximate the eigenvalue of the casing of the equipment on which the drive component is mounted. Processing. Note that the filter processing may be performed through a hardware filter circuit or may be previously subjected to software signal processing. In addition, when a plurality of types of filter processing are executed, the processing accuracy is improved. Filter processing includes basic processing such as LPF (low frequency cutoff), HPF (high frequency cutoff), BPF (band cutoff) for frequency characteristics, envelope processing and flutter processing for the entire time characteristics, and Necessary frequency increase / decrease processing can be applied.
- LPF low frequency cutoff
- HPF high frequency cutoff
- BPF band cutoff
- the user's (human) subjectivity and physiological response evaluation experiments are performed on natural sounds, targeting an unspecified number of humans, using the original time waveform of natural sounds. .
- the impression of “sound” is clarified using multivariate analysis such as the SD method (Semantic Differential Method).
- salivary amylase test, heart rate measurement, electroencephalogram measurement, etc. which are highly correlated with the stress value, are conducted to clarify the amount of human sense of pleasure and discomfort with respect to the original natural sound. To be reflected in the contents of signal processing.
- Subjective evaluation basically involves presenting multiple test sounds to the subject, and listening directly to the presented test sound to give an audible impression for multiple adjective pairs (for example, pleasant-unpleasant). Get graded evaluation (referred to as SD method). Furthermore, by calculating the contribution rate for each adjective pair evaluated for all test sounds, the impression of the sound can be expressed as a physical quantity.
- Physiological response evaluation measures the electrocardiogram, heart rate, brain wave, etc. while listening to the actual test sound. In addition, after listening to the sound, the stress value or the like for the test sound is measured by measuring salivary amylase or the like.
- the post-processing waveform example 102 reflects the results of the user's subjective and physiological response evaluation experiments, and changes in the time axis waveform after improving the frequency band and peak frequency component that match or approximate the housing of the home appliance It is.
- a relatively gentle wind change component in “wind” has a large periodicity in terms of time axis fluctuation, and does not have a peak frequency component.
- a sudden change such as a gust included in the “wind” results in a waveform that performs a peak-dip (impulse) in a short time, and the temporal pitch is narrow.
- the component of the relatively slow time axis change is evaluated as “pleasant” in the subjective and physiological response evaluation experiments, and the sound pressure level factor is evaluated as about 30 dB at maximum with the frequency fluctuation of 100 Hz or less.
- the component of the time axis change in a short time is evaluated as “uncomfortable” in the subjective and physiological reaction evaluation experiments, and the sound pressure level factor is evaluated as 35 dB or more with a frequency fluctuation of 100 Hz or more.
- the pleasant sound device A operates the driving component with a signal that is improved by the minimum necessary in the filtering process, evaluates the driving state of the driving component at that time, and evaluates the human subjective and physiological reaction, and based on the result, A signal based on the processed variation characteristic is selected, and a post-processing waveform example 102 for operating the driving component based on the selected signal is created. Therefore, according to the pleasant sound device A, the human subjectivity and physiological response evaluation are further reflected while improving the frequency band and the peak frequency component that match or approximate the housing of the home appliance, so that for humans, “ It is possible to generate an acoustic characteristic that is determined to be “comfortable”.
- the indoor unit 110 includes a housing 111, a fan 112, a motor unit 113, and a control device 115.
- the casing 111 forms an outline of the indoor unit 110, and houses the fan 112 and the motor unit 113 therein.
- the fan 112 takes in air in the air-conditioning target area into the casing 111 and blows out air that has undergone heat exchange in the air-conditioning target area.
- the motor unit 113 drives the fan 112 by controlling the rotation by the control device 115.
- the control device 115 drives the motor unit 113 based on the processed waveform example 102 of the pleasant sound device A.
- the housing 111 also accommodates a heat exchanger and the like.
- the control device 115 rotates the motor unit 113 based on the inputted post-processing waveform example 102.
- the post-processing waveform example 102 is gradual and the sound pressure level having no peak frequency component and the pitch adjustment on the time axis are performed. For this reason, the motor unit 113 is controlled to be driven by a rotation that blows out a wind that approximates a gentle, natural wind. Further, since the processed waveform example 102 reflects human subjective and physiological response evaluation results, unpleasant factors for the rotation of the motor unit 113 are eliminated.
- the pleasant sound device A and the control device 115 are illustrated separately, but the pleasant sound device A may be provided as one function of the control device 115.
- FIG. 2 is a conceptual diagram showing an example of the result of analyzing the acoustic and vibration characteristics during the operation of the indoor unit 110. Based on FIG. 2, the result of analyzing the acoustic and vibration characteristics during the operation of the indoor unit 110 will be described.
- the horizontal axis represents frequency (kHz)
- the upper vertical axis represents sound pressure level response (db)
- the middle vertical axis represents vibration speed response (m / s)
- the lower vertical axis represents sound pressure level response (db).
- a waveform A shown in the upper part of FIG. 2 is an example of a frequency characteristic obtained by performing an average processing analysis on a time change in the natural world at an arbitrary time, and includes a peak frequency component f1 and a “wide frequency band” f2 having an arbitrary sound pressure level. ,have.
- a waveform B shown in the middle stage of FIG. 2 is an example of frequency characteristics obtained by analyzing the inherent vibration frequency of the casing 111 of the indoor unit 110.
- the peak frequency component f1 of the waveform A and the “wide frequency band” ” Having a peak frequency component coinciding with f2.
- the waveform C shown in the lower part of FIG. 2 is obtained by filtering the waveform A.
- the waveform C is obtained by processing the result of subjectivity and physiological response evaluation of human “pleasantness and discomfort” with respect to the waveform A by filtering processing, and calculating the peak frequency component and frequency band evaluated as “discomfort” as “ It is attenuated to a sound pressure level that is evaluated as “comfortable”.
- the indoor unit 110 can be operated with the processing waveform example 102 supplied to the motor unit 113, and the acoustic characteristics (noise characteristics) generated at that time are waveforms. C, and can provide an acoustic characteristic that is always determined to be “pleasant” for humans.
- a motor, a fan, or the like can be rotated by a “quiet sound waveform” based on a physiological response evaluation result.
- FIG. FIG. 3 is a schematic diagram for explaining the outline of the equipment sound generating device (hereinafter simply referred to as the sound generating device B) according to Embodiment 2 of the present invention.
- the sound generating device B is used for the indoor unit 110 of an air conditioner that is an example of equipment.
- the pleasant sound device B is designed to induce a pleasant sound of noise generated during operation of home appliances, to induce sleep, or to induce a cool and warm feeling when operating an air conditioner, for example.
- differences from the first embodiment will be mainly described, and the same parts as those in the first embodiment will be denoted by the same reference numerals and description thereof will be omitted.
- the pleasant sounding device B has the structure of the pleasant sounding device A according to the first embodiment as a basic structure, and also has a sound emitting device 200 represented by a speaker or the like.
- the pleasant sounding apparatus B can store a time waveform 210 for an additional sound source (hereinafter referred to as an additional sound source waveform 210) supplied to the sound radiation device 200.
- the pleasant sound device B includes a filter processing unit 101 and can store a processed waveform example 102.
- the sound emitting device 200 is installed in a vacant space of the casing 111 of the indoor unit 110.
- the indoor unit 110 may be installed in the vicinity of an opening through which the fan 112 discharges air. This is because if the sound emitting device 200 is installed at such a position, sound can be emitted to the fan 112. Therefore, if the pleasant sounding apparatus B is used, the sound generated by the fan 112 and the sound generated by the sound emitting device 200 are superposed on each other from the inside of the housing 111 of the home appliance (in the case of the indoor unit 110 in FIG. 3). Sound can be emitted to the outside.
- the additional sound source waveform 210 uses a natural sound filtered based on temporal fluctuation factors of “heartbeat” indispensable to human life rhythm. Sounds in the natural world are, for example, “waves” and “wind”, and based on these signal components, the additional sound source waveform 210 is created using “fluctuations” of the basic signal components in particular. .
- the post-processing waveform example 102 for driving the motor unit 113 is as described in the first embodiment. Therefore, since the operation of the motor unit 113 is controlled by the post-processing waveform example 102, the casing vibration noise that occurs irregularly is suppressed. In this motor operating environment, the pleasant sounding apparatus B further uses the additional sound source waveform 210 for the sound radiating device 200.
- FIG. 4 is a schematic diagram for explaining the additional sound source waveform 210 created by the pleasant sound device B.
- FIG. 5 is a conceptual diagram illustrating an example of frequency characteristics during operation of the indoor unit 110.
- the additional sound source waveform 210 will be described in detail with reference to FIGS. 4 shows an actual heartbeat waveform example 300 (hereinafter referred to as an actual heartbeat waveform example 300).
- the additional sound source waveform 210 is illustrated in the lower part of FIG. In FIG. 5, the horizontal axis indicates the frequency (kHz), and the upper vertical axis and the lower vertical axis indicate the sound pressure level response (db).
- the actual heartbeat waveform example 300 has a waveform form corresponding to the vibration of the heartbeat caused by the heart valve. As shown in FIG. 4, in the actual heartbeat waveform example 300, when the time interval between R1 and R2 is long enough, the parasympathetic nerve is dominant, and it is qualitatively in a relaxed state with less stress. As will be described later, the superiority of the pitch interval of the voltage level of the additional sound source waveform 210 can be verified by experimental verification by the subject. However, this R1-R2 interval has an average of 60 to 70 HR (HR: heart rate in units of BPM / min), and it is known that an unpleasant factor increases even if the heart rate is higher or lower than the average. It has become.
- HR heart rate in units of BPM / min
- the sound pressure level and period are adjusted so as to obtain a sound rhythm with an average heart rate value of 60 to 70 HR as the standard pitch of the sound.
- This intensity of sound is applied as a “fluctuation” component to the additional sound source waveform 210 supplied to the sound emitting device 200.
- the result of arbitrarily processing the time waveform of the natural sound of “wind” and “wave” using such an average heartbeat temporal variation becomes the additional sound source waveform 210, which has a waveform form as shown in FIG. It is made.
- the final adjustment of the additional sound source waveform 210 is the result of selecting the waveform so that the R1-R2 interval of the heart rate, which is subjective and physiological evaluation, is 50 to 60 BPM, and the saliva amylase result is around 35 KU / L. It is.
- the frequency characteristics of the operating state of the home appliance when the additional sound source waveform 210 is used are as shown in FIG.
- a waveform obtained by operating the motor unit 113 and the fan 112 by rotation in a natural period with the unpleasant factor removed is a solid line, and has a gentle mountain (f1).
- the frequency characteristic from the sound radiation device 200 by the additional sound source waveform 210 is as shown by a broken line a. This is because the adjustment is based on the sound of “waves” and has a so-called “fluctuation” period due to heartbeats, etc., and the frequency characteristic has two gentle peaks (f2 and f3). Indicates. Thereby, stress can be reduced and, for example, sleep induction at bedtime can be caused.
- the periodic fluctuation is shortened (around 45 BPM), and the two gentle peaks (f4 and f5) of the frequency band used for reproducing the additional sound source are changed to a slightly higher frequency band so that the water drop falling sound or the like is steady.
- a “cool feeling” can be obtained by giving “fluctuation” that approximates a simple sound (dashed line b).
- “fluctuation” that approximates two gentle peaks (f6 and f7) to a stationary sound such as a heater is given.
- a “warm feeling” can be obtained (dashed line c). Note that although f1 and f7 are in substantially the same band, the sound pressure level of f7 is adjusted to be lower by about 5 dB than the sound pressure level of f1.
- the pleasant sounding device B when used for a home appliance such as an air conditioner, after the temperature adjustment of the home appliance is arbitrarily determined, the “cool feeling” or “ A warm feeling can be provided. Therefore, by using the pleasant sounding device B, it is possible to realize energy saving with respect to the operation of the installed home appliance.
- the sound pressure level of the frequency characteristic that is a gentle peak for the additional sound source is reproduced to be lower in the range of about 1 to 5 dB than the sound pressure level of the waveform (driving sound) for operating the fan. It is good to provide as a level that makes it difficult to hear sound. By doing so, the operation is like a background noise, and by taking out the same sound pressure level, the sound pressure from the additional sound source creates a new stress for humans.
- a motor, a fan, or the like can be rotated by a “quiet sound waveform” based on the user's subjective and physiological response evaluation results.
- the waveform can be added to the equipment as a secondary signal.
- the pleasant sounding device B it is possible to contribute to the realization of energy saving with respect to the operation of the installed home appliance.
- FIG. FIG. 6 is a schematic diagram for explaining the outline of the equipment sound generating device (hereinafter simply referred to as the sound generating device C) according to Embodiment 3 of the present invention.
- the sound generating device C is designed to induce a pleasant sound of noise generated during operation of a home appliance, sleep induction, or a cool feeling or warm feeling during, for example, an air conditioner operation.
- differences from the first and second embodiments are mainly described, and the same parts as those in the first and second embodiments are denoted by the same reference numerals and the description thereof is omitted.
- the indoor unit 110 includes a flap 400 for blowing the wind from the indoor unit 110 in an arbitrary direction.
- the flap 400 is provided at the air outlet of the casing 111.
- the pleasant sounding device C is installed in one or more clearances inside the indoor unit 110.
- the small sound emitting device 410 is made of a piezoelectric material such as PZT that can emit ultrasonic waves.
- the small sound emitting device 410 can be reduced in size and thickness. Therefore, the installation space of the indoor unit 110 on which the pleasant sounding device C is mounted does not need to have a large capacity, which contributes to downsizing of the indoor unit 110.
- the small sound emitting device 410 is installed so as to perform “sound emission” in parallel with the longitudinal direction of the flap 400.
- the small sound emitting device 410 can emit sound linearly with respect to the lateral direction (left-right width direction) in the casing 111.
- the acoustic circuit unit 420 that causes linear sound emission from the small sound emission device 410.
- the acoustic circuit unit 420 includes a signal generation unit 421, a modulation unit 422, and an oscillation circuit unit 423 for oscillating a frequency equivalent to the resonance frequency of the small sound radiation device 410. That is, linear sound radiation from the small sound radiation device 410 is executed in three configurations of the signal generation unit 421, the modulation unit 422, and the oscillation circuit unit 423.
- the signal generation unit 421 of the acoustic circuit unit 420 controls “sound source data” controlled by an arbitrary frequency band or rhythm based on a physiological response evaluation by natural sound that enables a human to reduce stress, induce sleep, or feel cool or warm. It has.
- the oscillation circuit unit 423 of the acoustic circuit unit 420 creates an oscillation frequency of 30 kHz.
- the oscillation frequency of 30 kHz is superimposed (added) by the modulation unit 422 of the acoustic circuit unit 420 and the signal of the signal generation unit 421 of the acoustic circuit unit 420.
- the signal from the signal generation unit 421 of the acoustic circuit unit 420 having “sound source data” is superimposed on the ultrasonic band signal from the oscillation circuit unit 423 of the acoustic circuit unit 420 by the modulation unit 422 of the acoustic circuit unit 420 ( Add) process.
- the added signal is radiated from the small sound radiation device 410 into the housing 111.
- the emitted signal repeats radiation-reflection between the opposite facing surface of the small sound emitting device 410 and the small sound emitting device 410.
- a “wall” of sound by linear sound radiation is created between the fan 112 and the flap 400 (arrow P shown in FIG. 6).
- the noise mixed sound from the fan 112 is blocked by the “masking” phenomenon of the “sound wall” formed by the signal radiated from the small sound emitting device 410, and the wind from the fan 112 itself is separated from the flap 400. It can be blown out of the body 111.
- the modulated sound causes a demodulation phenomenon, and sound is generated along with the demodulation on the reflection surface and its vicinity. Due to this demodulation phenomenon, “sound generation” filtered in the natural world occurs, and “sound” due to an arbitrary signal of the acoustic circuit unit 420 is generated and propagates from the inside of the housing 111 to the outside of the housing 111. That is, sound emission for inducing sleep, a feeling of cooling, and a feeling of warmth is performed, and simultaneously with the wind of the fan 112, the sound is radiated from the outside of the casing 111 and radiated to humans.
- the pleasant sounding device C in the equipment that rotates the motor, the fan, etc. with the non-stationary signal using the periodic signal and the temporal fluctuation characteristics of the natural world, like the pleasant sounding devices A and B.
- the motor, the fan, and the like can be rotated by a “quiet sound waveform” based on the user's subjective and physiological response evaluation results.
- the waveform can be added to the equipment as a secondary signal.
- the pleasant sounding device C the wind itself can be blown out, and at the same time, sound emission for bringing about sleep induction, cold feeling and warm feeling can be executed.
- the application example of the pleasant sounding apparatus according to the present invention is described based on the indoor unit 110 of the air conditioner.
- the pleasant sounding apparatus according to the present invention is applied to the indoor unit 110 of the air conditioner. It is not limited to that.
- the pleasant sounding device according to the present invention can be applied to other household appliances that generate sound, such as other air conditioners and vacuum cleaners, and other appliances that have problems such as inverter noise other than household appliances.
- the characteristic tendency for a certain age group is shown, but the frequency band of the additional sound source is affected by the auditory characteristics depending on the age. Therefore, the pleasant sounding apparatus according to the present invention can move (change) the frequency band reproduced by the additional sound source to the lower frequency band side according to the age group according to aging, for example, The selection may be made arbitrarily by entering the age using a remote controller or the like that controls the home appliance.
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Abstract
Description
(2)不快でないようにするための付加すべき音の位相が、騒音の位相と一致して、付加する音源が第2の騒音源になってしまう可能性がある。
(3)人間の生理反応などを殆ど考慮していない人工音源のために、付加する音への不快感が発生する場合がある。
(5)高精度な信号処理をして不快感を低減する音を出す場合、専用の音響設計を施したスピーカなどの音放射手段が必要になるが、家電機器には高性能なスピーカユニットを設置できるだけのコスト及び空間環境は存在しない。
図1は、本発明の実施の形態1に係る設備機器音の快音化装置(以下、単に快音化装置Aと称する)の概要を説明するための概略図である。ここでは、快音化装置Aを、設備機器の一例である空気調和機の室内機110に用いた場合を例に説明する。快音化装置Aは、周期信号及び自然界の時間的な変動特性を用いた非定常信号でモータやファンなどの駆動部品を回転させる設備機器に用いられ、生活者(使用者)の主観及び生理反応評価を基づく「快音化波形」によって駆動部品の運転を行い、不快な音の快音化を図るようにしたものである。
生理反応評価は、実際の試験音を聞いている時に、心電、心拍や脳波などを計測する。また、音を聞いた後に、唾液アミラーゼなどの計測を行うことで、試験音に対するストレス値等を計測する。
逆に、短時間での時間軸変化の成分は主観及び生理反応評価実験では「不快」と評価され、100Hz以上の周波数変動で、音圧レベル的な要因は35dB以上と評価される。
室内機110は、筐体111、ファン112、モータ部113、及び、制御装置115を有している。筐体111は、室内機110の外郭を形成するものであり、内部にファン112及びモータ部113が収容される。ファン112は、筐体111の内部に空調対象域の空気を取り込み、空調対象域に熱交換させた空気を吹き出すものである。モータ部113は、制御装置115によって回転が制御されることで、ファン112を駆動するものである。制御装置115は、快音化装置Aの処理後波形例102に基づいてモータ部113を駆動するものである。なお、図示していないが、筐体111には、熱交換器等も収容されている。
図3は、本発明の実施の形態2に係る設備機器音の快音化装置(以下、単に快音化装置Bと称する)の概要を説明するための概略図である。ここでは、快音化装置Bを、設備機器の一例である空気調和機の室内機110に用いた場合を例に説明する。快音化装置Bは、家電製品の運転時に発生する騒音の快音化、睡眠誘発、あるいは、例えばエアコン運転時での涼感や暖感を誘発するようにしたものである。なお、実施の形態2では実施の形態1との相違点を中心に説明し、実施の形態1と同一部分には、同一符号を付して説明を省略するものとする。
このモータ運転環境において、快音化装置Bでは、更に音放射デバイス200用の付加音源波形210を用いるようにしている。
逆に、周期的な変動を長くして(90BPM前後)、低い周波数帯域に変化させることで2つのなだらかな山(f6とf7)をヒータなどの定常的な音に近似した「ゆらぎ」を与えることができ、結果として「暖感」を得ることができる(破線c)。
なお、f1とf7は略同じ帯域にあるが、f7の音圧レベルはf1の音圧レベルよりも5dB前後低くして再生するように調整している。
図6は、本発明の実施の形態3に係る設備機器音の快音化装置(以下、単に快音化装置Cと称する)の概要を説明するための概略図である。ここでは、快音化装置Cを、設備機器の一例である空気調和機の室内機110に用いた場合を例に説明する。快音化装置Cは、家電製品の運転時に発生する騒音の快音化、睡眠誘発、あるいは、例えばエアコン運転時での涼感や暖感を誘発するようにしたものである。なお、実施の形態3では実施の形態1,2との相違点を中心に説明し、実施の形態1,2と同一部分には、同一符号を付して説明を省略するものとする。
快音化装置Cは、 実施の形態1に係る快音化装置A、実施の形態2に係る快音化装置Bの構成を基本構成として有する他、室内機110の内部の端部隙間に一つ以上設置した小型音放射デバイス410と、小型音放射デバイス410を駆動させるための変調機を含む音響回路部420と、を有している。
Claims (8)
- 自然界で生じている音の時間的な周波数の変動特性を用いて駆動部品を運転させる機器から発生される音を快音化する快音化装置であって、
自然界で生じている音の時間的な周波数の変動特性の周波数成分のうち前記駆動部品が搭載される前記機器の筐体の固有値と一致又は近似している部分を抑制するようにフィルタ処理し、
前記フィルタ処理した変動特性に基づく信号を、前記駆動部品を運転させたときの自然界で生じている音に対する人間の主観及び生理反応に基づいて評価し、
前記人間の主観及び生理反応の評価結果に基づき、前記フィルタ処理した変動特性に基づく信号を選択し、選択された信号に基づいて前記駆動部品の運転信号を創生する
ことを特徴とする設備機器音の快音化装置。 - 前記機器の内部及び外部に音放射デバイスを備え、
前記音放射デバイスは、
自然界の音の音圧レベル及び周期を人間の平均心拍数を用いて調整された音を放射する
ことを特徴とする請求項1に記載の設備機器音の快音化装置。 - 前記音放射デバイスから放射する音の音圧レベルは、
前記駆動部品を運転したときに発生する運転音の音圧レベルよりも1~5dB前後の範囲で低くしている
ことを特徴とする請求項2に記載の設備機器音の快音化装置。 - 前記音放射デバイスは、
自然界の音に所定の信号処理を施した音源データを備えた信号発生部と、
前記音放射デバイスを超音波帯域で駆動させる発振回路部と、
前記信号発生部からの信号を前記発振回路部からの超音波帯域の信号に重畳処理する変調部と、を備えている
ことを特徴とする請求項2又は3に記載の設備機器音の快音化装置。 - 前記駆動部品がファンであり、前記筐体に吹出口が形成されているものにおいて、
前記音放射デバイスは、
前記吹出口を挟んで前記筐体の一方の端部側に設置されており、
前記音放射デバイスから放射された音が、
前記音放射デバイスと前記筐体の他方の端部側であって前記音放射デバイスとの対向位置との間で放射-反射を繰り返すことで音の壁を構成する
ことを特徴とする請求項4に記載の設備機器音の快音化装置。 - 前記変調部よって変調され、前記音放射デバイスから放射された音が、
前記筐体の他方の端部側であって前記音放射デバイスとの対向位置で復調して音が再生される
ことを特徴とする請求項5に記載の設備機器音の快音化装置。 - 前記音放射デバイスから発生させる音の周波数特性の帯域は、
年齢層に応じて変化可能にしている
ことを特徴とする請求項4~6のいずれか一項に記載の設備機器音の快音化装置。 - 自然界で生じている音の時間的な周波数の変動特性を用いて駆動部品を運転させる機器から発生される音を快音化する快音化方法であって、
自然界で生じている音の時間的な周波数の変動特性の周波数成分のうち前記駆動部品が搭載される前記機器の筐体の固有値と一致又は近似している部分を抑制して加工し、
加工した周波数の変動特性に基づく信号を、前記駆動部品を運転させたときの自然界で生じている音に対する人間の主観及び生理反応に基づいて評価し、
前記人間の主観及び生理反応の評価結果に基づき、前記加工した変動特性に基づく信号を選択し、
この選択された信号に基づいて前記駆動部品の運転信号を創生し、
自然界の音の音圧レベル及び周期を予め求めた人間の平均心拍数を用いて調整した音を付加音源として放射する
ことを特徴とする設備機器の快音化方法。
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