CN111050244A - Method for monitoring ambient sound of earphone, electronic device and computer readable storage medium - Google Patents
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- CN111050244A CN111050244A CN201911267276.5A CN201911267276A CN111050244A CN 111050244 A CN111050244 A CN 111050244A CN 201911267276 A CN201911267276 A CN 201911267276A CN 111050244 A CN111050244 A CN 111050244A
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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
- H04R1/1041—Mechanical or electronic switches, or control elements
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Abstract
The invention relates to an earphone environmental sound monitoring method, an electronic device and a computer readable storage medium, comprising the following steps: collecting the external environmental sound of the earphone, and periodically judging the sudden change condition of the environmental sound; if the environmental sound does not change suddenly, controlling the left ear and the right ear in the earphone to play according to the set volume; if the environmental sound changes suddenly, judging the sound direction of the sudden change environmental sound, and reducing the broadcast volume of the left ear and keeping the right ear unchanged when the sound direction is judged to be on the left side of the earphone; and when the sound direction is judged to be on the right side of the earphone, the broadcast volume of the right ear is reduced, and the left ear is kept unchanged. According to the invention, the volume of the broadcast of the earphone close to the sudden change environmental sound is only reduced, and the volume of the other earphone is kept unchanged, so that a user can hear the environmental sound through the earphone close to the sudden change environmental sound, thus obtaining warning sounds such as automobile whistling in time, and the current music playing content can be continued through the other earphone, so that the music is kept uninterrupted, and the music experience is improved.
Description
Technical Field
The present invention relates to the field of earphone broadcasting, and in particular, to an earphone environment sound monitoring method, an electronic device, and a computer-readable storage medium.
Background
Ambient sounds, which are broadly referred to as various sounds around the human ear.
For the earphone, it is necessary to set a function of adjusting the volume of broadcast according to the environmental sound in real time (hereinafter referred to as an environmental sound monitoring function), because the user blocks the ear while wearing the earphone and is insensitive to the external environmental sound, the user cannot obtain the warning sounds such as car whistle in time, which is easy to cause various troubles and dangers, and at this time, if the earphone has the environmental sound monitoring function, the above difficult problems can be solved well.
However, in the conventional ambient sound monitoring function, the earphone does not distinguish the source of the ambient sound, and a mode of lowering the volume of the binaural broadcast once the ambient sound exceeds a threshold value is often adopted.
Disclosure of Invention
The invention provides an earphone environmental sound monitoring method, an electronic device and a computer readable storage medium for overcoming the defects in the prior art, and aims to realize normal monitoring and music playing of environmental sound and guarantee safety of travel.
To this end, a method for listening to ambient sound of a headset is provided, comprising:
step A, collecting external environment sound of the earphone, and periodically judging the sudden change condition of the environment sound;
b, if the environmental sound does not change suddenly, controlling the left ear and the right ear in the earphone to broadcast according to the set volume;
c, if the environmental sound changes suddenly, judging the sound direction of the sudden change environmental sound, and reducing the broadcast volume of the left ear and keeping the right ear unchanged when the sound direction is judged to be on the left side of the earphone; and when the sound direction is judged to be on the right side of the earphone, the broadcast volume of the right ear is reduced, and the left ear is kept unchanged.
Preferably, step C further comprises:
and when the sound direction is judged to be in front of or behind the earphone, the broadcast volume of the left ear and the right ear is reduced.
Preferably, the specific method for judging the environmental sound mutation in the step a comprises:
and periodically analyzing the sound collection energy of the environmental sound, and considering that the environmental sound is mutated when the sound collection energy exceeds a preset threshold value.
Preferably, the sampling energy of the environmental sound is calculated by using an RMS algorithm.
Preferably, the headset has a plurality of microphone nodes, each microphone node being arranged linearly to form a microphone array;
the specific method for judging the sound direction in the step C comprises the following steps:
acquiring time delay difference T of sudden change environmental sound reaching a microphone node Mi and a microphone node Mj in a microphone arrayi,jAccording to time delay difference Ti,jThe sound bearing is analyzed.
Preferably, the time delay difference Ti,jSubstitution into
And calculating an incident angle theta, and representing the sound direction by the incident angle theta, wherein c is the sound wave propagation speed and d is the distance between the microphone node Mi and the microphone node Mj.
Preferably, the plurality of incident angles θ are averaged to reduce the error.
Preferably, the time delay difference Ti,jThe calculating method comprises the following steps:
continuously acquiring the signal M1(T) of the microphone node Mi and the signal M2(T) of the microphone node Mj in a time period T1-T2, and sending the signals into a cross correlator
Drawing a function curve according to a correlation function R (T) output by the cross correlator, and selecting a maximum peak value Rmax from the curve;
reversely determining the time delay difference T according to the maximum peak value Rmaxi,j。
There is also provided an electronic device, wherein the electronic device comprises:
a controller; and the number of the first and second groups,
a memory arranged to store computer executable instructions which, when executed, cause the controller to implement the method described above.
A computer-readable storage medium is also provided, wherein the computer-readable storage medium stores one or more programs which, when executed by a controller, implement the above-described method.
Has the advantages that:
according to the invention, the volume of the broadcast of the earphone close to the sudden change environmental sound is only reduced, and the volume of the other earphone is kept unchanged, so that a user can hear the environmental sound through the earphone close to the sudden change environmental sound, thus obtaining warning sounds such as automobile whistling in time, and the current music playing content can be continued through the other earphone, so that the music is kept uninterrupted, and the music experience is improved.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a flow chart illustrating an ambient sound listening method of the present invention;
FIG. 2 shows the determination of the delay difference T according to the present inventioni,jA schematic diagram of (a);
fig. 3 shows the situation when an abrupt ambient sound reaches the microphone array;
FIG. 4 is a schematic structural diagram of an electronic device according to the present invention;
fig. 5 is a schematic structural diagram of a computer-readable storage medium according to the present invention.
Detailed Description
The ambient sound monitoring method of the present embodiment is suitable for an earphone having a plurality of microphone nodes, wherein the plurality of microphone nodes are respectively electrically connected to a controller in the earphone, the microphone nodes are linearly arranged to form a microphone array, and the number of microphones in each microphone node may be single or multiple.
The ambient sound listening method of the present embodiment is programmed to store executable instructions in a memory in the headset, and the executable instructions are executed by the controller to implement the following steps as shown in fig. 1:
s11, collecting all environment sounds outside the earphone by using a microphone array, periodically judging whether a certain environment sound is mutated, if all the environment sounds are not mutated, inquiring the current set volume of the earphone, broadcasting according to the set volume, and otherwise, executing the volume control of the step S12.
The specific method for judging the environmental sound mutation is as follows: and (3) aiming at each environmental sound, periodically calculating the sound collection energy of the environmental sound for a certain time (such as 20ms) by adopting an RMS (mean square deviation) algorithm, and if the sound collection energy exceeds a preset threshold, determining that the environmental sound is mutated.
Step S12, actively adjusting the broadcasting volume of the corresponding left ear and right ear according to the sound direction of the sudden change environment sound, specifically: if the position of the earphone is on the left side of the earphone, the broadcast volume of the left ear is reduced, and the right ear is kept unchanged; if the direction of the earphone is on the right side of the earphone, the broadcast volume of the right ear is reduced, and the left ear is kept unchanged.
This step is through only reducing the broadcast volume of the earphone that closes on sudden change environment sound, keeps another earphone volume unchangeable for the user both can hear the environment sound through the earphone that closes on sudden change environment sound, thereby in time acquires warning sounds such as car whistle, and another earphone of accessible continues the music broadcast content at that time again, keeps the music incessant, improves music experience.
Further, if the sound direction of the sudden change environment sound is judged to be in front of or behind the earphone, the broadcast volume of the left ear and the right ear is reduced simultaneously. According to data statistics, when the ordinary people heard warning sound, the health often makes the reaction of reminding the source in order to confirm the condition or directly flee from the warning source of reminding of visualing, and the sound position of sudden change environment sound becomes the place ahead or the rear of earphone this moment, and the earphone reduces the broadcast volume of left and right ears simultaneously under the current situation, aims at the convenience of customers and guarantees that it can hear the environment sound clearly when reacting.
In step S12, the method of determining the sound direction includes the steps of:
step S121. referring to FIG. 2, the controller continuously collects the signal M1(T) of the microphone node Mi and the signal M2(T) of the microphone node Mj in a time period T1-T2 and sends the signals into a cross correlator.
And S122, drawing a function curve according to the correlation function R (T) output by the cross correlator, and selecting the maximum peak value Rmax from the curve.
Step S123, reversely determining a time delay difference T from a mutation environment sound to a microphone node Mi and a microphone node Mj according to the maximum peak value Rmaxi,j。
Step s124, referring to fig. 3, considering a case of linear arrangement of microphone nodes in a microphone array, assuming that an abrupt change environmental sound comes from a far field, the abrupt change environmental sound appears to be a plane wave when reaching the microphone array, assuming that an incident angle of the abrupt change environmental sound is θ, a sound wave propagation speed is c, and a distance between a microphone node Mi and a microphone node Mj is d, then a time delay difference t between sound waves received between the microphone nodes Mi and Mj is obtainedi,jComprises the following steps:
converting the above into:
in the above formula, Ti,jCan be processed by the steps ofS123, measurement is carried out, and the measurement is substituted into a formula to obtain an incidence angle theta, wherein the theta represents the sound direction.
Step s125, considering that the estimation of θ has errors, a plurality of estimation values may be averaged, for example:
it should be noted that, in the following description,
in this embodiment, the microphone nodes may be distributed only in the left ear or the right ear, or may be distributed in the left ear and the right ear.
The method of the present embodiment may be implemented by a method that is converted into program steps and apparatuses that can be stored in a computer storage medium and invoked and executed by a controller.
The algorithms and displays presented herein are not inherently related to any particular computer, virtual machine, or other apparatus nor is the particular language used to disclose the best mode of the invention.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it will be appreciated that in order to streamline the disclosure and facilitate an understanding of one or more of the various inventive aspects, a switch is made. Various general purpose devices may be used with the teachings herein. The required structure for constructing such a device will be apparent from the description above. Moreover, the present invention is not directed to any particular programming language. It should be appreciated that the subject matter of the present invention described herein can be implemented with various programming languages, and in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments.
The various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. It will be appreciated by those skilled in the art that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components of the apparatus for detecting a wearing state of an electronic device according to embodiments of the present invention. The present invention may also be embodied as apparatus or device programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present invention may be stored on computer-readable media or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.
For example, fig. 4 shows a schematic structural diagram of an electronic device according to an embodiment of the invention. The electronic device conventionally comprises a processor 41 and a memory 42 arranged to store computer executable instructions (program code). The memory 42 may be an electronic memory such as a flash memory, an EEPROM (electrically erasable programmable read only memory), an EPROM, a hard disk, or a ROM. The memory 42 has a storage space 43 storing program code 44 for performing any of the method steps in the embodiments. For example, the storage space 43 for the program code may comprise respective program codes 44 for respectively implementing the various steps in the above method. The program code can be read from or written to one or more computer program products. These computer program products comprise a program code carrier such as a hard disk, a Compact Disc (CD), a memory card or a floppy disk. Such a computer program product is typically a computer readable storage medium such as described in fig. 5. The computer readable storage medium may have memory segments, memory spaces, etc. arranged similarly to the memory 42 in the electronic device of fig. 4. The program code may be compressed, for example, in a suitable form. In general, the memory unit stores program code 51 for performing the steps of the method according to the invention, i.e. program code readable by a processor such as 41, which when run by an electronic device causes the electronic device to perform the individual steps of the method described above.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
Claims (10)
1. An ambient sound listening method for a headset, comprising:
step A, collecting external environment sound of the earphone, and periodically judging the sudden change condition of the environment sound;
b, if the environmental sound does not change suddenly, controlling the left ear and the right ear in the earphone to broadcast according to the set volume;
c, if the environmental sound changes suddenly, judging the sound direction of the sudden change environmental sound, and reducing the broadcast volume of the left ear and keeping the right ear unchanged when the sound direction is judged to be on the left side of the earphone; and when the sound direction is judged to be on the right side of the earphone, the broadcast volume of the right ear is reduced, and the left ear is kept unchanged.
2. The method of claim 1, wherein step C further comprises:
and when the sound direction is judged to be in front of or behind the earphone, the broadcast volume of the left ear and the right ear is reduced.
3. The method according to claim 1, wherein the specific method for determining the environmental sound mutation in the step a comprises:
and periodically analyzing the sound collection energy of the environmental sound, and considering that the environmental sound is mutated when the sound collection energy exceeds a preset threshold value.
4. The method of claim 3, wherein: and calculating the sound collecting energy of the environmental sound by using an RMS (root mean square) algorithm.
5. The method of claim 1,
the earphone is provided with a plurality of microphone nodes, and the microphone nodes are linearly arranged to form a microphone array;
the specific method for judging the sound direction in the step C comprises the following steps:
acquiring time delay difference T of sudden change environmental sound reaching a microphone node Mi and a microphone node Mj in a microphone arrayi,jAccording to time delay difference Ti,jThe sound bearing is analyzed.
6. The method of claim 5, wherein:
the time delay difference Ti,jSubstitution into
And calculating an incident angle theta, and representing the sound direction by the incident angle theta, wherein c is the sound wave propagation speed and d is the distance between the microphone node Mi and the microphone node Mj.
7. The method of claim 6, wherein: the plurality of incident angles theta are averaged to reduce the error.
8. The method according to claim 5, characterized in that said time delay difference Ti,jThe calculating method comprises the following steps:
continuously acquiring the signal M1(T) of the microphone node Mi and the signal M2(T) of the microphone node Mj in a time period T1-T2, and sending the signals into a cross correlator
Drawing a function curve according to a correlation function R (T) output by the cross correlator, and selecting a maximum peak value Rmax from the curve;
reversely determining the time delay difference T according to the maximum peak value Rmaxi,j。
9. Computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1-8.
10. An electronic device, wherein the electronic device comprises:
a controller; and the number of the first and second groups,
a memory arranged to store computer executable instructions that, when executed, cause the controller to implement the method of any one of claims 1-8.
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