CN111800704A - Double-earphone sound effect equalization adjusting method and system - Google Patents
Double-earphone sound effect equalization adjusting method and system Download PDFInfo
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- CN111800704A CN111800704A CN202010789996.4A CN202010789996A CN111800704A CN 111800704 A CN111800704 A CN 111800704A CN 202010789996 A CN202010789996 A CN 202010789996A CN 111800704 A CN111800704 A CN 111800704A
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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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
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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
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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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
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
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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
- H04R2203/00—Details of circuits for transducers, loudspeakers or microphones covered by H04R3/00 but not provided for in any of its subgroups
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Abstract
The invention discloses a method and a system for adjusting sound effect balance of double earphones, wherein the method comprises the following steps: taking the position of a noise source; defining one earphone of the double earphones, which is closer to the noise source, as a near-noise earphone, and defining the other earphone as a far-noise earphone; respectively acquiring the sound outside the ear collected by the near noise earphone and the far noise earphone, and calculating the sound volume decibel difference between the sound outside the ear of the near noise earphone and the sound outside the ear of the far noise earphone; and when the volume decibel difference of the sound outside the ear exceeds a preset first decibel threshold value, increasing the output volume of the far-noise earphone and/or decreasing the output volume of the near-noise earphone. The invention provides a method and a system for adjusting sound effect equalization of double earphones, which can automatically adjust the volume output values of the left and right earphones when noise occurs in the lateral direction of a user so as to equalize the volume values received by two ears, thereby improving the listening effect and avoiding hearing damage of the user.
Description
Technical Field
The invention relates to the technical field of wireless earphones, in particular to a method and a system for adjusting sound effect balance of double earphones.
Background
With the continuous development of social economy, the requirement of people on life quality is gradually improved by the fast-paced life style at present, and under the social environment, the appearance of the wireless earphone changes the life style of people, so that people can get rid of the constraint of wires to listen to audio anytime and anywhere, and the wireless earphone is matched with the trend of social development, and is rapidly popularized.
In the prior art, when a user has noise in a side direction while listening to audio by wearing a wireless headset, the sound volume of the dual-headset is often adjusted, for example, the publication number CN106604167B entitled method for automatically adjusting the left and right channel output sound volume of the headset and the patent of the mobile terminal disclose the following technical solutions: the electronic terminal calculates the azimuth and the volume of the current environmental noise sound source; according to the calculated position and volume of the current environmental noise sound source, the output volume of the left sound channel and the right sound channel of the earphone is automatically adjusted, and through the above modes, the volume of the earphone can be quickly and automatically adjusted when the user uses the earphone of the electronic terminal so as to be self-adaptive to the current environmental noise, so that the user does not need to perform complicated manual operation, and the earphone is more convenient and humanized, and the use experience of the user is improved. However, after the volume of the dual earphones is adjusted by the scheme disclosed in the above patent, the volume received by the ear close to the noise source is larger than the volume received by the ear far from the noise source, so that the receiving volumes of the left ear and the right ear are unbalanced, which may affect the listening effect, and may cause hearing loss even in such an environment for a long time.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method and a system for adjusting the sound effect balance of double earphones, which solve the problem of unbalanced volume received by double ears due to the influence of side noise when a wireless earphone is worn to listen to audio in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a method for adjusting sound effect balance of double earphones comprises the following steps:
acquiring the position of a noise source; defining one earphone of the double earphones, which is closer to the noise source, as a near-noise earphone, and defining the other earphone as a far-noise earphone;
respectively acquiring the sound outside the ear collected by the near noise earphone and the far noise earphone, and calculating the sound volume decibel difference between the sound outside the ear of the near noise earphone and the sound outside the ear of the far noise earphone;
and when the volume decibel difference of the sound outside the ear exceeds a preset first decibel threshold value, increasing the output volume of the far-noise earphone and/or decreasing the output volume of the near-noise earphone.
Optionally, the steps of: after increasing the output volume in the far-noise headphones and/or decreasing the output volume in the near-noise headphones, the method further comprises:
respectively acquiring in-ear sounds acquired from the near-noise earphone and the far-noise earphone, calculating in-ear volume decibel differences of the in-ear sounds of the near-noise earphone and the in-ear sounds of the far-noise earphone, and judging whether the in-ear volume decibel differences exceed a preset second decibel threshold value;
if the in-ear volume decibel difference exceeds a preset second decibel threshold value, when the in-ear sound volume decibel of the near-noise earphone is larger than the in-ear sound volume decibel of the far-noise earphone, reducing the output volume of the near-noise earphone and/or increasing the output volume of the far-noise earphone; and when the volume decibel of the sound in the ear of the near-noise earphone is smaller than the volume decibel of the sound in the ear of the far-noise earphone, reducing the output volume of the far-noise earphone and/or increasing the output volume of the near-noise earphone.
Optionally, the steps of: judging whether the in-ear volume decibel difference exceeds a preset second decibel threshold value or not, further comprising:
if the in-ear volume decibel difference does not exceed the preset second decibel threshold, judging whether the in-ear volume decibel difference exceeds a preset third decibel threshold;
if the in-ear volume decibel difference exceeds a preset third decibel threshold, when the in-ear sound decibel of the near-noise earphone is greater than the in-ear sound decibel of the far-noise earphone, reducing the output volume of the near-noise earphone and/or increasing the output volume of the far-noise earphone; when the volume decibel of the sound in the ear of the near-noise earphone is smaller than the volume decibel of the sound in the ear of the far-noise earphone, reducing the output volume of the far-noise earphone and/or increasing the output volume of the near-noise earphone;
the third decibel threshold is less than the second decibel threshold.
Optionally, the steps of: acquiring a location of a noise source, comprising:
selecting at least two microphones for collecting sound outside ears from the double earphones as base stations respectively;
acquiring the arrival time of sound on each base station;
calculating the difference of arrival time between every two base stations;
and determining the coordinates of the noise source by using a TDOA method according to the calculated difference value of the arrival time.
Optionally, the steps of: increasing an output volume in the far-noise headphones, and/or decreasing an output volume in the near-noise headphones, comprising:
calculating a volume decibel difference between the sound outside the ear in the near-noise earphone and a preset reference volume to obtain a first reference value; calculating a volume decibel difference between the sound outside the ear in the far-noise earphone and a preset reference volume to obtain a second reference value;
comparing the sound outside the ear in the noise-approaching earphone with the reference volume, and judging whether the sound outside the ear is larger than the reference volume;
if so, increasing the output volume in the far-noise earphone, and simultaneously reducing the output volume in the near-noise earphone; wherein a reduction value of the output volume of the near-noise earphone is greater than or equal to the first reference value, and a sum of the reduction value of the output volume of the near-noise earphone and an increase value of the output volume of the far-noise earphone is equal to the out-of-ear volume decibel difference;
if not, increasing the output volume in the far-noise earphone, wherein the increase value of the output volume of the far-noise earphone is equal to the decibel difference of the volume outside the ear, or
And increasing the output volume of the far-noise earphone, and simultaneously reducing the output volume of the near-noise earphone, wherein the sum of the reduction value of the output volume of the near-noise earphone and the increase value of the output volume of the far-noise earphone is equal to the out-of-ear volume decibel difference.
The invention also provides a double-earphone sound effect equalization adjusting system, which comprises a terminal and double earphones, wherein the double earphones are connected with:
the acquiring unit is used for acquiring the position of a noise source and respectively acquiring the sound outside the ear collected on the near-noise earphone and the far-noise earphone;
the processing unit is used for calculating the out-of-ear volume decibel difference between the out-of-ear sound of the near-noise earphone and the out-of-ear sound of the far-noise earphone and outputting a calculation result;
and the execution unit is used for increasing the output volume of the far-noise earphone and/or reducing the output volume of the near-noise earphone when the volume decibel difference of the sound outside the ear exceeds a preset first decibel threshold value.
Optionally, the processing unit is further configured to switch one of the two earphones closer to the noise source to a master earphone for communication connection with the terminal, and switch the other earphone to a slave earphone.
Optionally, the left earphone and the right earphone are respectively provided with:
the earphone comprises a feedforward microphone, a voice microphone and a feedback microphone, wherein the feedforward microphone and the voice microphone are positioned outside an ear, the feedforward microphone is positioned at one end of the earphone far away from a mouth of a person, and the voice microphone is positioned at one end of the earphone close to the ear of the person;
the feedforward microphone is used for collecting external environment sounds, the voice microphone is used for collecting voice sounds, and the feedback microphone is used for collecting in-ear sounds;
the acquisition unit is used for acquiring in-ear sounds acquired by the feedback microphone, acquiring external environment sounds acquired by the feedforward microphone and voice sounds acquired by the voice microphone, and finally acquiring out-of-ear sounds;
the execution unit is used for increasing the output volume of the far-noise earphone and/or reducing the output volume of the near-noise earphone when the volume decibel difference of the sound in the ear exceeds a preset second decibel threshold value and the volume decibel of the sound in the ear of the near-noise earphone is greater than the volume decibel of the sound in the ear of the far-noise earphone; when the volume decibel of the sound in the ear of the near-noise earphone is smaller than the volume decibel of the sound in the ear of the far-noise earphone, reducing the output volume of the far-noise earphone and/or increasing the output volume of the near-noise earphone;
the execution unit is further configured to reduce the output volume of the near-noise earphone and/or increase the output volume of the far-noise earphone when the in-ear volume decibel difference does not exceed a preset second decibel threshold but exceeds a preset third decibel threshold and the in-ear volume decibel of the near-noise earphone is greater than the in-ear volume decibel of the far-noise earphone; when the volume decibel of the sound in the ear of the near-noise earphone is smaller than the volume decibel of the sound in the ear of the far-noise earphone, reducing the output volume of the far-noise earphone and/or increasing the output volume of the near-noise earphone;
wherein the third decibel threshold is less than the second decibel threshold.
Optionally, the mobile terminal further includes a position determining unit, configured to:
selecting at least two microphones for collecting sound outside ears from the double earphones as base stations respectively;
acquiring the arrival time of sound on each base station;
calculating the difference of arrival time between every two base stations;
and determining the coordinates of the noise source by using a TDOA method according to the calculated difference value of the arrival time.
Optionally, the processing unit includes:
main amplifier G connected with feedforward microphone, voice microphone and feedback microphone in left earphone respectivelyL1Main amplifier GL2And a main amplifier GL3；
The main amplifier GL3Is connected to an inverter through which a sound signal is input to the main amplifier GL3Then outputting a first detection signal; the main amplifier GL1Main amplifier GL2And a main amplifier GL3Is connected to a first main processor for superimposing the main amplifier GL1And a main amplifier GL2Is worth ofObtaining a first main gain signal, and processing the first main gain signal based on the first detection signal to obtain a first compensation value;
main amplifier G connected to feedforward microphone, voice microphone and feedback microphone in right earphone respectivelyR1Main amplifier GR2And a main amplifier GR3；
The main amplifier GR3Is connected to an inverter through which a sound signal is input to the main amplifier GR3Then outputting a second detection signal; the main amplifier GR1Main amplifier GR2And a main amplifier GR3Is connected to a first main processor for superimposing the main amplifier GR1Main amplifier GR2And processing the second main gain signal based on the second detection signal to obtain a second compensation value.
The processing unit further comprises:
auxiliary amplifier G connected with feedforward microphone and voice microphone in left earphone respectivelyL1' and auxiliary amplifier GL2' and an auxiliary amplifier G connected to the feedforward microphone and the speech microphone in the right earphone, respectivelyR1' and auxiliary amplifier GR2'; the auxiliary amplifier GL1', auxiliary amplifier GL2', auxiliary amplifier GR1' and auxiliary amplifier GR2The output end of the' is connected with an auxiliary processor; the auxiliary processor is used for superposing the auxiliary amplifier GL1' and auxiliary amplifier GL2' the output value of which yields a first auxiliary gain signal, also for superimposing the auxiliary amplifier GR1' and auxiliary amplifier GR2'obtaining a second auxiliary gain signal from the output value of' and finally calculating the gain difference between the first auxiliary gain signal and the second auxiliary gain signal;
and the mixing subunit is connected with the first main processor, the second main processor and the auxiliary processor and is used for respectively obtaining output volume adjusting signals of the left earphone and the right earphone according to the first compensation value, the second compensation value and the gain difference value.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a method and a system for adjusting sound effect equalization of double earphones, which can automatically adjust the volume output values of the left and right earphones when noise occurs in the lateral direction of a user so as to equalize the volume values received by two ears, thereby improving the listening effect and avoiding hearing damage of the user.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic flow chart of a method for adjusting sound effect equalization of dual earphones according to the present invention;
fig. 2 is a schematic flow chart of step S1 in the method for adjusting sound effect equalization of dual earphones according to the present invention;
fig. 3 is a schematic flow chart of step S4 in the method for adjusting sound effect equalization of dual earphones according to the present invention;
FIG. 4 is an interaction diagram of a dual-earphone sound effect equalization adjustment system and a terminal according to the present invention;
FIG. 5 is a schematic diagram of a dual-earphone sound effect equalization adjustment system for obtaining the position of a noise source according to the present invention;
FIG. 6 is another schematic diagram of a dual-earphone sound effect equalization adjustment system of the present invention for obtaining the position of a noise source;
FIG. 7 is a schematic structural diagram of a dual-earphone sound effect equalization adjustment system according to the present invention;
fig. 8 is a schematic diagram of a processing unit in a dual-earphone sound effect equalization adjustment system according to the present invention.
In the above figures: 10. a terminal; 20. a left earphone; 30. a right earphone; 40. an acquisition unit; 50. a processing unit; 60. an execution unit; 70. a position determination unit.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to accurately understand the embodiments of the present invention, some terms related to the embodiments of the present invention are exemplarily explained below.
TDOA (Time Difference of Arrival, Time Difference): TDOA location is a method of location using time differences. By measuring the time of arrival of the signal at the monitoring station, the distance of the signal source can be determined. The location of the signal can be determined by the distance from the signal source to each monitoring station (taking the monitoring station as the center and the distance as the radius to make a circle). However, the absolute time is generally difficult to measure, and by comparing the absolute time difference of the arrival of the signal at each monitoring station, a hyperbola with the monitoring station as the focus and the distance difference as the major axis can be formed, and the intersection point of the hyperbola is the position of the signal.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Referring to fig. 1 to fig. 3, a method for adjusting sound effect equalization of dual earphones includes the following steps:
and S1, acquiring the position of the noise source.
Specifically, the steps include:
s101, selecting at least two microphones for collecting sound outside the ear from the left earphone 20 and the right earphone 30 as base stations;
s102, obtaining the arrival time of the sound on each base station;
s103, calculating the difference of arrival time between every two base stations;
and S104, determining the coordinates of the noise source by using a TDOA method according to the calculated difference value of each arrival time.
In addition, according to the coordinates of the noise source, the near-noise earphone and the far-noise earphone are determined, and the specific method comprises the following steps:
coordinates of target reference points preset on the left earphone 20 and the right earphone 30 are respectively obtained, and linear distance values between the left earphone 20 and the right earphone 30 and a noise source are respectively calculated according to the obtained coordinates of the noise source. Specifically, the straight-line distance values between the left and right earphones 20 and 30 and the noise source may be calculated using a distance formula between two points in space, respectively.
Then, the calculated linear distance values between the left earphone 20 and the right earphone 30 and the noise source are compared, and the earphone corresponding to the linear distance value with a small value is defined as a near-noise earphone, and the other earphone is defined as a far-noise earphone.
In this embodiment, it may also be determined whether the near-noise earphone is the master earphone, and if not, the near-noise earphone is switched to the master earphone and the far-noise earphone is switched to the slave earphone, so as to ensure the accuracy of volume adjustment in the subsequent adjustment step.
Specifically, the switching between the master earphone and the slave earphone can be realized by referring to the technical solution disclosed in the patent application No. 201810291345.5, and redundant description is omitted here. Since the master earphone is used to actively receive the audio signal of the terminal 10, the slave earphone is used to copy the audio signal in the master earphone for playing, and the extra-aural sound on the near-noise earphone is mainly compared with the reference volume in the subsequent volume adjustment step, switching the near-noise earphone to the master earphone is beneficial to the volume adjustment of the left and right earphones 30, and is also convenient to ensure the volume adjustment effect.
Specifically, referring to fig. 4 to 6, the implementation method of step S1 is as follows:
in the figure, M is a noise source, the left earphone 20 and the right earphone 30 are respectively positioned on two ears of a user, and since there is a time difference when sound waves of the noise source are transmitted to the left earphone 20 and the right earphone 30, at least four positions are needed to determine one point according to the TDOA positioning method.
In the embodiment of the present invention, the feedforward microphone and the voice microphone in the left earphone 20 and the right earphone 30 are respectively used, and the implementation is realized by four microphones in total; it can be understood that the number of microphones may be greater than four, and the greater the number is, the more the accurate positioning is facilitated, and only two microphones are mostly used for acquiring the sound signals outside the ear in the wireless headset of the prior art, so that the present embodiment takes four for explanation.
In one arrangement, a plane P is defined by L1, R1, R2, and L2 is not located in the plane, so that the arrival times of sounds thereon differ from those of L1, R1, and R2. As shown, the coordinate system is established by selecting L2 as the reference point, and the distances between the noise source and each microphone are d11, d12, d21, and d22, respectively.
Further, the M position is determined by solving equation F (M) ═ F (d11, d12, d21, d 22); wherein, L2(0, 0), M (X, Y, Z); assume L1(Xl1, Yl1, Zl1), R1(XR1, YR1, ZR1), R2(XR2, YR2, ZR 2); the time difference of M to propagate to L1, L2, R1 and R2 is t1, t2, t3 and t4 respectively;
based on this, the following formula is obtained:
d11-d21＝v*(t1-t3)；
d21-d22＝v*(t3-t4)；
d12-d22＝v*(t2-t4)；
d11-d12＝v*(t1-t2)；
further, the calculation formula is exemplified as follows:
d11＝((X-Xl1)2+(Y-Yl1)2+(Z-Zl1)2)1/2；
d12＝...
d21＝...
d22＝...
by analogy, according to the equation set calculated and established, the coordinate value of the M position in F (M) relative to the coordinate system is solved to realize the spatial sound source positioning.
Further, the above expression scheme can be briefly summarized as follows:
1) the three sampling points of L1, R1 and R2 can determine the position of a sound source on a single straight line intersecting a plane, but the position cannot be accurately determined;
2) the addition of L2 enables the determination of bearing and distance on the above-identified straight lines, i.e., the determination of unique sound source location points.
And S2, acquiring the sound outside the ear collected by the near-noise earphone and the far-noise earphone respectively, and calculating the sound volume decibel difference between the sound outside the ear of the near-noise earphone and the sound outside the ear of the far-noise earphone.
S3, judging whether the decibel difference of the sound volume outside the ear exceeds a preset first decibel threshold value; if yes, go to step S4; if not, go to step S5.
The sound signals outside the ear comprise voice sounds and external environment sounds, the voice sounds are collected by a voice microphone located at one end close to the human ear in the near-noise earphone/far-noise earphone, the external environment sounds are collected by a feedforward microphone located at one end far away from the human ear in the near-noise earphone/far-noise earphone, and the voice microphone and the feedforward microphone are located outside the ear.
S4, increasing the output volume in the far-noise headphones, and/or decreasing the output volume in the near-noise headphones.
Specifically, the steps include:
s401, calculating a volume decibel difference between the sound outside the ear in the near-noise earphone and a preset reference volume to obtain a first reference value; and calculating the volume decibel difference between the sound outside the ear in the far-noise earphone and the preset reference volume to obtain a second reference value.
The preset reference volume can be determined by referring to the hearing upper limit value of the human ear, and a value smaller than the hearing upper limit value of the human ear is preferably selected to ensure that the volume received by the human ear does not exceed the tolerance limit.
S402, comparing the sound outside the ear in the near-noise earphone with the reference volume, and judging whether the sound outside the ear is larger than the reference volume; if yes, go to step S403; if not, go to step S404.
Because the total volume value received by the ear close to the noise source is larger than the total volume value received by the ear far away from the noise source, the extra-aural sound in the ear close to the noise source is selected to be compared with the reference volume, and the highest value of the total volume values received by the ears is lower than the upper limit of the hearing sense of the ear.
And S403, increasing the output volume in the far-noise earphone and simultaneously reducing the output volume in the near-noise earphone.
The reduction value of the output volume of the near-noise earphone is greater than or equal to a first reference value, and the sum of the reduction value of the output volume of the near-noise earphone and the increase value of the output volume of the far-noise earphone is equal to the decibel difference of the volume outside the ear.
If the sound outside the ear in the near-noise earphone is larger than the reference volume, the output volume of the near-noise earphone needs to be reduced, so that the total volume value received by the ear is within the volume range which can be received by human ears. In addition, the sum of the reduction value of the output volume of the near noise earphone and the increase value of the output volume of the far noise earphone is equal to the decibel difference of the volume outside the ears, so that the sound in the ears tends to be balanced.
S404, increasing the output volume in the far-noise earphone, wherein the increase value of the output volume of the far-noise earphone is equal to the decibel difference of the volume outside the ear; or increasing the output volume in the far-noise headphones while decreasing the output volume in the near-noise headphones.
When the sound outside the ear in the near-noise earphone is smaller than the reference volume, the output volume of the near-noise earphone can be adjusted, or the output volume of the near-noise earphone can not be adjusted.
When the output volume of the near-noise earphone is not adjusted, the in-ear sound of double ears tends to be balanced only by enabling the output volume of the far-noise earphone to be increased to be equal to the decibel difference of the out-of-ear volume.
When the output volume of the near-noise earphone is adjusted, step S403 may be referred to, so that the sum of the decrease value of the output volume of the near-noise earphone and the increase value of the output volume of the far-noise earphone is equal to the out-of-ear volume decibel difference.
Specifically, the step S4 can be implemented based on the following method:
firstly, carrying out inverse amplification on in-ear sounds collected by a near noise earphone/a far noise earphone to obtain a detection signal; the output volumes of the left earphone 20 and the right earphone 30 can be adjusted in real time according to the actual sound production conditions by using the in-ear sound as the detection value.
Secondly, the voice sound collected by the near noise earphone/far noise earphone and the sound of the external environment are respectively amplified in the positive direction and are superposed to obtain a first main gain signal/a second main gain signal; the first gain signal is processed in the near-noise earphone and/or the far-noise earphone based on the detection signal to obtain a first compensation value/a second compensation value.
The first compensation value and the second compensation value are the difference between the current receiving in-ear sound of the human ear and the preset reference volume, and the final volume output values of the two earphones can be within the bearing range of the human ear based on the first reference value and the second reference value.
Then, the sound signals outside the ear collected by the near noise earphone and the far noise earphone are respectively amplified in the positive direction, and the sound volume decibel difference between the near noise earphone and the far noise earphone is taken to obtain the sound volume decibel difference outside the ear; and respectively obtaining output volume adjusting signals of the left earphone 20 and the right earphone 30 according to the first reference value, the second reference value and the out-of-ear volume decibel difference.
The first reference value, the second reference value and the out-of-ear volume decibel difference are combined, processing is carried out in the gain system to obtain an output volume adjusting signal, the final volume output values of the left earphone 20 and the right earphone 30 can be enabled to be balanced after the out-of-ear sound is superimposed, and meanwhile the volume bearing range of human ears is met.
Finally, the output volume is adjusted in the left earphone 20 and the right earphone 30 according to the output volume adjustment signal.
And S5, acquiring the in-ear sounds collected on the near noise earphone and the far noise earphone respectively, and calculating the in-ear volume decibel difference between the in-ear sound of the near noise earphone and the in-ear sound of the far noise earphone.
S6, judging whether the in-ear volume decibel difference exceeds a preset second decibel threshold value or not; if yes, go to step S7; if not, go to step S8.
Since the in-ear sound includes the output volume of the headphone and also includes the partial volume of the sound outside the ear transmitted into the ear of the person, in step S5, by respectively obtaining the in-ear sounds in the near-noise headphone and the far-noise headphone, it can be further detected whether the total volume value received by the ear of the person is balanced, and when the total volume value is unbalanced, the output volumes of the near-noise headphone and the far-noise headphone are adjusted again to ensure the hearing balance of the ears. In this step, the adjusting method in step S4 may be referred to for adjusting the output volumes of the near-noise earphone and the far-noise earphone, and details are not repeated here.
S7, when the volume decibel of the sound in the ear of the near-noise earphone is larger than the volume decibel of the sound in the ear of the far-noise earphone, reducing the output volume of the near-noise earphone and/or increasing the output volume of the far-noise earphone; and when the volume decibel of the sound in the ear of the near-noise earphone is smaller than the volume decibel of the sound in the ear of the far-noise earphone, reducing the output volume of the far-noise earphone and/or increasing the output volume of the near-noise earphone.
S8, judging whether the in-ear volume decibel difference exceeds a preset third decibel threshold, if so, returning to the step S7; if not, the process returns to step S1.
In particular, the third decibel threshold is less than the second decibel threshold, and therefore this step serves to achieve finer adjustment of the binaural output volume.
When the in-ear sounds of the near noise earphone and the far noise earphone are equal, or the volume decibel difference of the in-ear sounds of the near noise earphone and the far noise earphone is smaller than a third decibel threshold value, the volume balance condition of the sound cavity is initially met.
Referring to fig. 7, based on the foregoing embodiment, the present invention further provides a system for equalizing and adjusting sound effects of dual earphones, including a terminal 10, a left earphone 20, a right earphone 30, and units connecting the left earphone 20 and the right earphone 30, which includes the following specific steps:
the obtaining unit 40 is configured to obtain a position of the noise source, and further configured to obtain the extra-aural sounds collected on the near-noise earphone and the far-noise earphone of the left earphone 20 and the right earphone 30, respectively.
And the processing unit 50 is used for calculating the out-of-ear volume decibel difference of the out-of-ear sound in the near noise earphone and the far noise earphone and outputting the calculation result.
An execution unit 60 for:
and when the out-of-ear volume decibel difference exceeds a preset first threshold value, increasing the output volume in the far-noise earphone and/or reducing the output volume in the near-noise earphone.
When the in-ear volume decibel difference exceeds a preset second decibel threshold value, when the in-ear sound volume decibel of the near-noise earphone is larger than the in-ear sound volume decibel of the far-noise earphone, the output volume of the far-noise earphone is increased, and/or the output volume of the near-noise earphone is reduced; and when the volume decibel of the sound in the ear of the near-noise earphone is smaller than the volume decibel of the sound in the ear of the far-noise earphone, reducing the output volume of the far-noise earphone and/or increasing the output volume of the near-noise earphone.
In addition, the execution unit is further configured to reduce the output volume of the near-noise earphone and/or increase the output volume of the far-noise earphone when the in-ear volume decibel difference does not exceed the preset second decibel threshold but exceeds the preset third decibel threshold and the in-ear volume decibel of the near-noise earphone is greater than the in-ear volume decibel of the far-noise earphone; when the volume decibel of the sound in the ear of the near-noise earphone is smaller than the volume decibel of the sound in the ear of the far-noise earphone, reducing the output volume of the far-noise earphone and/or increasing the output volume of the near-noise earphone; and the third decibel threshold value is smaller than the second decibel threshold value.
A position determining unit 70, configured to select at least two microphones for collecting sounds outside ears from the dual earphones as base stations, respectively; acquiring the arrival time of sound on each base station; calculating the difference of arrival time between every two base stations; and determining the coordinates of the noise source by using a TDOA method according to the calculated difference value of the arrival time.
Further, the left headphone 20 is provided with:
a feedforward microphone L1, a voice microphone L2 and a feedback microphone L3, the feedforward microphone L1 and the voice microphone L2 being located outside the ear, and the feedforward microphone L1 being located at the end of the earpiece remote from the mouth of the person, and the voice microphone L2 being located at the end of the earpiece close to the ear of the person.
The right earphone 30 is provided with:
a feedforward microphone R1, a voice microphone R2 and a feedback microphone R3, the feedforward microphone R1 and the voice microphone R2 being located outside the ear, and the feedforward microphone R1 being located at the end of the earpiece remote from the person's mouth, and the voice microphone R2 being located at the end of the earpiece close to the person's ear.
The feedforward microphone L1 and the feedforward microphone R1 are used for collecting external environment sounds, the voice microphone L2 and the voice microphone R2 are used for collecting voice sounds, and the feedback microphone L3 and the feedback microphone R3 are used for collecting in-ear sounds; further, the ear sound signal includes a voice sound and an external environment sound.
And the obtaining unit 40 is configured to obtain the in-ear sound according to the in-ear sound, and further obtain the voice sound and the external environment sound according to the external environment sound and the voice sound, respectively, and finally obtain the out-of-ear sound.
Referring to fig. 8, the processing unit 50 includes:
a main processing circuit comprising:
a main amplifier G connected to the feedforward microphone, the voice microphone and the feedback microphone of the left earphone 20 respectivelyL1Main amplifier GL2And a main amplifier GL3。
A main amplifier G respectively connected with the feedforward microphone, the voice microphone and the feedback microphone of the right earphone 30R1Main amplifier GR2And a main amplifier GR3。
In the main processing circuit:
main amplifier G corresponding to feedforward microphone L1 and voice microphone L2L1Main amplifier GL2The forward sampling is amplified so that the multiple is a positive gain as input; main amplifier G corresponding to feedback microphone L3L3The feedback samples are amplified so that their multiples are negative gains as inputs.
Main amplifier G corresponding to feedforward microphone R1 and voice microphone R2R1Main amplifier GR2The forward sampling is amplified so that the multiple is a positive gain as input; main amplifier G corresponding to feedback microphone R3R3The feedback samples are amplified so that their multiples are negative gains as inputs.
Wherein, the main amplifier GL3Is connected with an inverter, and the sound signal is input into a main amplifier G through the inverterL3And then outputs a first detection signal. Main amplifier GL1Main amplifier GL2And a main amplifier GL3Has an output connected to a first main processor for superimposing a main amplifier GL1And a main amplifier GL2The first main gain signal is obtained from the output value of the first gain compensation circuit, and the first main gain signal is processed based on the first detection signal to obtain a first compensation value.
Identical, main amplifier GR3Is connected with an inverter, and the sound signal is input into a main amplifier G through the inverterR3Then outputting a second detection signal; main amplifier GR1Main amplifier GR2And a main amplifier GR3Has an output connected to a first main processor for superimposing a main amplifier GR1Main amplifier GR2And processing the second main gain signal based on the second detection signal to obtain a second compensation value.
An auxiliary processing circuit comprising:
auxiliary amplifier G connected to the feedforward microphone and the speech microphone in the left earphone 20, respectivelyL1' and auxiliary amplifier GL2' and an auxiliary amplifier G connected to the feedforward microphone and the speech microphone, respectively, in the right earphone 30R1' and auxiliary amplifier GR2'。
In the auxiliary processing circuit:
auxiliary amplifier G corresponding to feedforward microphone L1 and voice microphone L2L1' and auxiliary amplifier GL2' sampling and amplifying in positive direction so that the multiple is a positive amplification value as input; auxiliary amplifier G corresponding to feedforward microphone R1 and voice microphone R2R1' and auxiliary amplifier GR2' and the positive samples are amplified so that their multiples are positive amplification values as inputs.
Wherein an auxiliary amplifier GL1', auxiliary amplifier GL2', auxiliary amplifier GR1' and auxiliary amplifier GR2The output of the' is connected with an auxiliary processor. The auxiliary processor is used for superposing an auxiliary amplifier GL1' and auxiliary amplifier GL2' obtaining a first auxiliary gain signal, superimposing an auxiliary amplifier GR1' and auxiliary amplifier GR2' obtains a second auxiliary gain signal and calculates the gain difference between the first auxiliary gain signal and the second auxiliary gain signal.
And the mixing subunit is connected with the first main processor, the second main processor and the auxiliary processor, and is configured to obtain output volume adjustment signals of the left earphone 20 and the right earphone 30 according to the first compensation value, the second compensation value and the gain difference value. Finally, the speakers on the left earphone 20 and the right earphone 30 respectively receive the output volume adjusting signals output by the mixing subunit, and adjust the output volume based on the output volume adjusting signals.
Taking the left ear as an example, the main amplifier GL1Main amplifier GL2And a main amplifier GL3The main amplifier G completes the adjustment of the left ear sound in tandemL1And a main amplifier GL2Collecting sound outside the ear, main amplifier GL3The in-ear sound is collected, and the difference from the reference volume is calculated as a reference value for adjusting the amplification volume through step S4 in the foregoing embodiment.
Taking the right ear as an example, the main amplifier GR1Main amplifier GR2And a main amplifier GR3The main amplifier G completes the adjustment of the sound of the right ear in tandemR1And a main amplifier GR2Collecting sound outside the ear, main amplifier GR3The in-ear sound is collected, and the difference from the reference volume is calculated as a reference value for adjusting the amplification volume through step S4 in the foregoing embodiment.
Based on this, the left earphone 20 and the right earphone 30 in the foregoing steps are processed separately to obtain the first compensation value and the second compensation value, respectively.
Further, to achieve final left and right ear acoustic equalization, the main amplifier GL1Main amplifier GL2And a main amplifier GR1And a main amplifier GR2Sampling processing, namely calculating out-of-ear volume decibel difference based on the step S4; for example, when the out-of-ear sound volume decibel difference Δ 1 is found to be 3dB, the total adjustment value is equal to. It is understood that Δ 1 may have a unique correspondence, but ≠ Δ 1.
In one optional implementation of this embodiment, the relation to Δ 1 is, for example, as follows
＝lg(((GL1”*GL2')/(GL1'+GL2')+(GR1'*GR2')/(GR1'+GR2'))*△1)；
The total adjustment value is 1 for the speaker S1 in the near-noise earphone and 2 for the speaker S2 in the far-noise earphone, and | 1 | + | 2 |, then the volume output of the speaker S1 is decreased by 1 and the volume output of the speaker S2 is increased by 2.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for adjusting sound effect balance of double earphones is characterized by comprising the following steps:
acquiring the position of a noise source; defining one earphone of the double earphones, which is closer to the noise source, as a near-noise earphone, and defining the other earphone as a far-noise earphone;
respectively acquiring the sound outside the ear collected by the near noise earphone and the far noise earphone, and calculating the sound volume decibel difference between the sound outside the ear of the near noise earphone and the sound outside the ear of the far noise earphone;
and when the volume decibel difference outside the ear exceeds a preset first decibel threshold value, increasing the output volume of the far-noise earphone and/or decreasing the output volume of the near-noise earphone.
2. The method for adjusting the sound effect equalization of double earphones according to claim 1, wherein the steps of: after increasing the output volume in the far-noise headphones and/or decreasing the output volume in the near-noise headphones, the method further comprises:
respectively acquiring in-ear sounds acquired from the near-noise earphone and the far-noise earphone, calculating in-ear volume decibel differences of the in-ear sounds of the near-noise earphone and the in-ear sounds of the far-noise earphone, and judging whether the in-ear volume decibel differences exceed a preset second decibel threshold value;
if the in-ear volume decibel difference exceeds a preset second decibel threshold value, when the in-ear sound volume decibel of the near-noise earphone is larger than the in-ear sound volume decibel of the far-noise earphone, increasing the output volume of the far-noise earphone and/or reducing the output volume of the near-noise earphone; and when the volume decibel of the sound in the ear of the near-noise earphone is smaller than the volume decibel of the sound in the ear of the far-noise earphone, reducing the output volume of the far-noise earphone and/or increasing the output volume of the near-noise earphone.
3. The method for adjusting the sound effect equalization of double earphones according to claim 2, wherein the steps of: judging whether the in-ear volume decibel difference exceeds a preset second decibel threshold value or not, further comprising:
if the in-ear volume decibel difference does not exceed the preset second decibel threshold, judging whether the in-ear volume decibel difference exceeds a preset third decibel threshold;
if the in-ear volume decibel difference exceeds a preset third decibel threshold, when the in-ear sound decibel of the near-noise earphone is greater than the in-ear sound decibel of the far-noise earphone, reducing the output volume of the near-noise earphone and/or increasing the output volume of the far-noise earphone; when the volume decibel of the sound in the ear of the near-noise earphone is smaller than the volume decibel of the sound in the ear of the far-noise earphone, reducing the output volume of the far-noise earphone and/or increasing the output volume of the near-noise earphone;
the third decibel threshold is less than the second decibel threshold.
4. The method for adjusting the sound effect equalization of double earphones according to claim 1, wherein the steps of: acquiring a location of a noise source, comprising:
selecting at least two microphones for collecting sound outside ears from the double earphones as base stations respectively;
acquiring the arrival time of sound on each base station;
calculating the difference of arrival time between every two base stations;
and determining the coordinates of the noise source by using a TDOA method according to the calculated difference value of the arrival time.
5. The method for adjusting the sound effect equalization of double earphones according to claim 1, wherein the steps of: increasing an output volume in the far-noise headphones, and/or decreasing an output volume in the near-noise headphones, comprising:
calculating a volume decibel difference between the sound outside the ear in the near-noise earphone and a preset reference volume to obtain a first reference value; calculating a volume decibel difference between the sound outside the ear in the far-noise earphone and a preset reference volume to obtain a second reference value;
comparing the sound outside the ear in the noise-approaching earphone with the reference volume, and judging whether the sound outside the ear is larger than the reference volume;
if so, increasing the output volume in the far-noise earphone, and simultaneously reducing the output volume in the near-noise earphone; wherein a reduction value of the output volume of the near-noise earphone is greater than or equal to the first reference value, and a sum of the reduction value of the output volume of the near-noise earphone and an increase value of the output volume of the far-noise earphone is equal to the out-of-ear volume decibel difference;
if not, increasing the output volume in the far-noise earphone, wherein the increase value of the output volume of the far-noise earphone is equal to the decibel difference of the volume outside the ear, or
And increasing the output volume of the far-noise earphone, and simultaneously reducing the output volume of the near-noise earphone, wherein the sum of the reduction value of the output volume of the near-noise earphone and the increase value of the output volume of the far-noise earphone is equal to the out-of-ear volume decibel difference.
6. The utility model provides a balanced governing system of two earphone audio, its characterized in that, includes terminal and two earphones, be connected with on the two earphones:
the acquiring unit is used for acquiring the position of a noise source and respectively acquiring the sound outside the ear collected on the near-noise earphone and the far-noise earphone;
the processing unit is used for calculating the out-of-ear volume decibel difference between the out-of-ear sound of the near-noise earphone and the out-of-ear sound of the far-noise earphone and outputting a calculation result;
and the execution unit is used for increasing the output volume of the far-noise earphone and/or reducing the output volume of the near-noise earphone when the volume decibel difference of the sound outside the ear exceeds a preset first decibel threshold value.
7. The method of claim 6 wherein the processing unit is further configured to switch one of the dual earphones closer to the noise source to a master earphone for communication with the terminal and switch the other earphone to a slave earphone.
8. The dual-earphone sound effect equalization conditioning system of claim 6 wherein the left earphone and the right earphone are respectively provided with:
the earphone comprises a feedforward microphone, a voice microphone and a feedback microphone, wherein the feedforward microphone and the voice microphone are positioned outside an ear, the feedforward microphone is positioned at one end of the earphone far away from a mouth of a person, and the voice microphone is positioned at one end of the earphone close to the ear of the person;
the feedforward microphone is used for collecting external environment sounds, the voice microphone is used for collecting voice sounds, and the feedback microphone is used for collecting in-ear sounds;
the acquisition unit is used for acquiring in-ear sounds acquired by the feedback microphone, acquiring external environment sounds acquired by the feedforward microphone and voice sounds acquired by the voice microphone, and finally acquiring out-of-ear sounds;
the execution unit is used for increasing the output volume of the far-noise earphone and/or reducing the output volume of the near-noise earphone when the volume decibel difference of the sound in the ear exceeds a preset second decibel threshold value and the volume decibel of the sound in the ear of the near-noise earphone is greater than the volume decibel of the sound in the ear of the far-noise earphone; when the volume decibel of the sound in the ear of the near-noise earphone is smaller than the volume decibel of the sound in the ear of the far-noise earphone, reducing the output volume of the far-noise earphone and/or increasing the output volume of the near-noise earphone;
the execution unit is further configured to reduce the output volume of the near-noise earphone and/or increase the output volume of the far-noise earphone when the in-ear volume decibel difference does not exceed a preset second decibel threshold but exceeds a preset third decibel threshold and the in-ear volume decibel of the near-noise earphone is greater than the in-ear volume decibel of the far-noise earphone; when the volume decibel of the sound in the ear of the near-noise earphone is smaller than the volume decibel of the sound in the ear of the far-noise earphone, reducing the output volume of the far-noise earphone and/or increasing the output volume of the near-noise earphone;
wherein the third decibel threshold is less than the second decibel threshold.
9. The dual earphone sound effect equalization adjustment system of claim 6 further comprising a position determination unit for:
selecting at least two microphones for collecting sound outside ears from the double earphones as base stations respectively;
acquiring the arrival time of sound on each base station;
calculating the difference of arrival time between every two base stations;
and determining the coordinates of the noise source by using a TDOA method according to the calculated difference value of the arrival time.
10. The dual earphone sound effect equalization conditioning system of claim 8 wherein the processing unit comprises:
main amplifier G connected with feedforward microphone, voice microphone and feedback microphone in left earphone respectivelyL1Main amplifier GL2And a main amplifier GL3；
The main amplifier GL3Is connected to an inverter through which a sound signal is input to the main amplifier GL3Then outputting a first detection signal; the main amplifier GL1Main amplifier GL2And a main amplifierGL3Is connected to a first main processor for superimposing the main amplifier GL1And a main amplifier GL2Obtaining a first main gain signal based on the output value of the first gain detector, and processing the first main gain signal based on the first detection signal to obtain a first compensation value;
main amplifier G connected to feedforward microphone, voice microphone and feedback microphone in right earphone respectivelyR1Main amplifier GR2And a main amplifier GR3；
The main amplifier GR3Is connected to an inverter through which a sound signal is input to the main amplifier GR3Then outputting a second detection signal; the main amplifier GR1Main amplifier GR2And a main amplifier GR3Is connected to a first main processor for superimposing the main amplifier GR1Main amplifier GR2Obtaining a second main gain signal, and processing the second main gain signal based on the second detection signal to obtain a second compensation value;
the processing unit further comprises:
auxiliary amplifier G connected with feedforward microphone and voice microphone in left earphone respectivelyL1' and auxiliary amplifier GL2' and an auxiliary amplifier G connected to the feedforward microphone and the speech microphone in the right earphone, respectivelyR1' and auxiliary amplifier GR2'; the auxiliary amplifier GL1', auxiliary amplifier GL2', auxiliary amplifier GR1' and auxiliary amplifier GR2The output end of the' is connected with an auxiliary processor; the auxiliary processor is used for superposing the auxiliary amplifier GL1' and auxiliary amplifier GL2' the output value of which yields a first auxiliary gain signal, also for superimposing the auxiliary amplifier GR1' and auxiliary amplifier GR2'obtaining a second auxiliary gain signal from the output value of' and finally calculating the gain difference between the first auxiliary gain signal and the second auxiliary gain signal;
and the mixing subunit is connected with the first main processor, the second main processor and the auxiliary processor and is used for respectively obtaining output volume adjusting signals of the left earphone and the right earphone according to the first compensation value, the second compensation value and the gain difference value.
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