CN112653780B - Mobile terminal and method of controlling audio signal of mobile terminal - Google Patents
Mobile terminal and method of controlling audio signal of mobile terminal Download PDFInfo
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- CN112653780B CN112653780B CN201910920131.4A CN201910920131A CN112653780B CN 112653780 B CN112653780 B CN 112653780B CN 201910920131 A CN201910920131 A CN 201910920131A CN 112653780 B CN112653780 B CN 112653780B
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- sound outlet
- human body
- audio signal
- micro valve
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
- H04M1/035—Improving the acoustic characteristics by means of constructional features of the housing, e.g. ribs, walls, resonating chambers or cavities
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
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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
Abstract
The present disclosure relates to a mobile terminal and a method of controlling an audio signal of the mobile terminal. The mobile terminal includes: a receiver; a front sound outlet hole communicated with the receiver; the rear sound outlet is communicated with the earphone through a rear sound outlet channel, and the rear sound outlet is arranged on the back surface of the mobile terminal; an audio codec and a sonication engine electrically connected via the earpiece of the audio codec; and the micro valve is arranged at the rear sound outlet channel, and the opening of the micro valve is adjustable. The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects: the voice leakage of the terminal in the conversation process is effectively prevented, the information confidentiality is realized, the conversation quality is ensured, the problem of damage of other additional equipment is solved, and the personal health is protected.
Description
Technical Field
The present disclosure relates to the field of audio processing technologies, and in particular, to a mobile terminal and a method of controlling an audio signal of the mobile terminal.
Background
With the increasing development of communication technology, terminal devices such as mobile phones become indispensable necessities for people in daily life and work, and great convenience is brought to the contact between people and friends, colleagues and the like.
In the existing process of mobile phone communication, especially for people with hearing impairment, the voice is reduced, the voice of the person with hearing impairment is not clearly heard, the voice is enlarged, telephone content is leaked to the periphery, information is leaked after the voice is heard by the surrounding people, and various methods are adopted for preventing information leakage, for example, an earphone is used for plugging the earphone into an auditory canal, so that the communication definition is improved to a certain extent, and the voice leakage to the outside of ears is reduced. However, both the wired earphone and the wireless Bluetooth earphone are inconvenient to carry, the cable is easy to break, the earphone is easy to hurt the auditory canal and the tympanic membrane, and the hearing is reduced.
Disclosure of Invention
To overcome the problems in the related art, the present disclosure provides a mobile terminal and a method of controlling an audio signal of the mobile terminal.
According to an aspect of the present disclosure, there is provided a mobile terminal including: a receiver; a front sound outlet hole communicated with the receiver; the rear sound outlet is communicated with the earphone through a rear sound outlet channel, and the rear sound outlet is arranged on the back surface of the mobile terminal; an audio codec and a sonication engine electrically connected to the earpiece via the audio codec; and the micro valve is arranged at the rear sound outlet channel, and the opening of the micro valve is adjustable.
In one embodiment, the earphone is fixed inside the mobile terminal and is arranged between the front sound outlet and the rear sound outlet, the earphone comprises a vibrating diaphragm, a front sound outlet channel is arranged between the vibrating diaphragm and the front sound outlet, the earphone further comprises magnetic steel, and the magnetic steel faces the rear sound outlet channel.
In one embodiment, the rear sound outlet is disposed at a position near the top end of the back surface of the mobile terminal, the first side of the micro valve faces the magnetic steel, and the second side of the micro valve faces the rear sound outlet, wherein the amplitude of the audio signal output to the rear sound outlet by the earphone is adjusted by adjusting the size of the opening of the micro valve.
In one embodiment, the mobile terminal further comprises: a first microphone disposed on a back side of the mobile terminal, wherein the ultrasonic processing engine is electrically connected to the first microphone via the audio codec.
In one embodiment, the mobile terminal further comprises: the dustproof net is arranged between the micro valve and the rear sound outlet hole.
In one embodiment, the mobile terminal further comprises a second microphone, the second microphone being disposed on top of the mobile terminal. In one embodiment, the first microphone is disposed at an upper centered position on the back of the mobile terminal.
In one embodiment, the front sound outlet is disposed at a junction position of the top surface and the front surface of the mobile terminal, at the top, at the bottom or at the front surface.
According to another aspect of the present disclosure, there is provided a method of controlling an audio signal of a mobile terminal, the mobile terminal being the mobile terminal according to the above embodiment, the method including: adjusting the opening of the micro valve; and adjusting the amplitude of a second audio signal generated by the receiver and to be transmitted to the rear sound outlet through the micro valve by adjusting the size of the opening, so as to adjust the intensity of a first audio signal generated by the receiver and to be transmitted to the front sound outlet.
In one embodiment, the aperture of the regulator micro valve comprises: receiving a first ultrasonic signal detected by the first microphone; inputting the first ultrasonic signal into the ultrasonic processing engine for processing to obtain a human body distance; and adjusting the opening of the micro valve according to the human body distance and the preset value of the human body distance.
In one embodiment, the adjusting the opening of the micro valve further comprises: and when the human body distance is smaller than the preset human body distance value, adjusting the opening of the micro valve to be larger. And when the human body distance is greater than or equal to the preset value of the human body distance, the opening of the micro valve is regulated to be smaller.
In one embodiment, the inputting of the first digital ultrasonic signal into the ultrasonic processing engine for processing to obtain the human body distance comprises: recording a second point in time at which the ultrasonic processing engine controls the earpiece to generate a second ultrasonic signal; recording a first point in time when the first microphone detects the first ultrasonic signal; calculating a time difference between the second time point and the first time point; and calculating the human body distance based on the time difference.
In one embodiment, the method further comprises: transmitting the second digital ultrasonic signal generated by the ultrasonic processing engine and the third digital audio signal received from the mobile terminal to the audio codec; decoding the second digital ultrasonic signal and the third digital audio signal in the audio codec to obtain a second analog ultrasonic signal and a third analog audio signal; the second analog ultrasonic signal and the third analog audio signal are propagated to the outside of the earpiece through the front sound outlet.
The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects: the voice leakage of the terminal in the conversation process is effectively prevented, the information confidentiality is realized, the conversation quality is ensured, the problem of damage of other additional equipment is solved, and the personal health is protected.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic diagram illustrating a structure of a mobile terminal according to an exemplary embodiment of the present disclosure.
Fig. 2 is a block diagram illustrating a structure of a mobile terminal according to an exemplary embodiment of the present disclosure.
Fig. 3 is a perspective view illustrating a mobile terminal according to an exemplary embodiment of the present disclosure.
Fig. 4 is a perspective view illustrating a mobile terminal according to an exemplary embodiment of the present disclosure.
Fig. 5 is a usage scenario diagram illustrating a mobile terminal according to an exemplary embodiment of the present disclosure.
Fig. 6 is a flowchart illustrating a method of controlling an audio signal of a mobile terminal according to an exemplary embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the invention. Rather, they are merely examples of apparatus and methods consistent with an aspect of the invention as detailed in the accompanying claims.
Fig. 1 is a schematic diagram illustrating a structure of a mobile terminal according to a first exemplary embodiment of the present disclosure. Fig. 2 is a block diagram illustrating a structure of a mobile terminal according to a first exemplary embodiment of the present disclosure. Fig. 3 is a perspective view illustrating a mobile terminal according to a first exemplary embodiment of the present disclosure. Fig. 4 is a perspective view illustrating a mobile terminal according to a second exemplary embodiment of the present disclosure.
Referring to fig. 1 to 4, a mobile terminal 100 includes: an earpiece 120; a front sound outlet 111 communicating with the earpiece 120; a rear sound outlet 112, which is communicated with the earphone 120 through a rear sound outlet channel 116, wherein the rear sound outlet 112 is arranged at the back of the mobile terminal 100; an audio codec 170 and a ultrasound processing engine 151, the ultrasound processing engine 151 being electrically connected with the earpiece 120 via the audio codec 170; a micro valve 130 disposed at the rear sound outlet channel 116, the opening of the micro valve 130 being adjustable.
The mobile terminal 100 of the above-described structure has two audio output channels disposed opposite to each other, and audio output through the two opposite output channels has opposite phases, the same amplitude and frequency. Therefore, in the case where the two channels are completely opened, the audio output from the two channels destructively interfere, and thus the sound is not heard from outside the mobile terminal. Typically, only one channel is left to transmit audio after one of the channels is plugged, forming a common speaker. In this embodiment, by adjusting the amplitude of the audio of one channel, the principle of partially destructive interference of the audio of another channel is achieved, and the intensity of the audio leaking to the outside is reduced. In this embodiment, the micro-valve 130 is controlled electrically, and shares a power supply and a ground, and enables three paths, wherein the enabling signal is from the GPIO port of the terminal platform.
The mobile terminal 100 with the above structure realizes the partial destructive interference of the audio transmitted by the front sound outlet 111 through the adjustment of the amplitude of the audio transmitted by the rear sound outlet 112 by the adjustment of the micro valve 130, effectively prevents sound leakage, ensures the confidentiality of information, ensures the conversation quality, does not need to carry out information confidentiality through equipment such as an earphone and the like, solves the problem of the damage of other additional equipment, does not cause the harm of the earphone to the ears, and protects the personal health.
In this embodiment, the size of the opening of the micro valve 130 needs to be adjusted according to the distance of the person, and many methods for measuring the distance of the person are available, for example, infrared, temperature sensor, or image acquisition. However, the monitoring effect of the infrared or thermosensitive element can be influenced by the user or other factors, so that the effect is poor, the calculated amount of the mobile phone can be increased by monitoring the camera, and the performance of the mobile phone is influenced.
In one embodiment, the mobile terminal 100 further includes: an audio codec 170, the ultrasound processing engine 151 being electrically connected to the earpiece 120 via the audio codec 170, wherein the ultrasound processing engine 151 is adapted to process the received first ultrasound signal and to control the earpiece 120 to generate a second ultrasound signal.
The mobile terminal 100 receives an ultrasonic signal transmitted from the outside as an analog signal. In order to analyze the task approaching behavior, the first ultrasonic signal needs to be calculated and analyzed to obtain the distance data of the approaching person, and thus, after receiving the analog signal of the first ultrasonic signal, the mobile terminal 100 needs to decode the signal by the audio codec 170, that is, a process of converting the analog signal into a digital signal. The digital signal of the first ultrasonic wave is then transmitted to an ultrasonic processing engine 151 in the processor 150 for processing as described above. In addition, in order to acquire the person approaching information as described above, the received first ultrasonic signal is a signal reflected back by the approaching person, which needs to be transmitted from the mobile terminal 100, that is, the second ultrasonic signal of the present embodiment. Thus, the mobile terminal 100 is required to generate a second ultrasonic signal, which requires the ultrasonic processing engine 151 to send a control instruction to the earpiece 120, the second ultrasonic signal being generated by the earpiece 120. In this embodiment, the ultrasound processing engine 151 recommends a more mature solution for the market, such as an elliptical laboratory, etc. The audio codec 170 sampling rate suggests above 96 kHz.
The second ultrasonic signal transmitted as described above is generated from the earpiece 120 and emitted through the front sound outlet 111, and thus the arrangement of the earpiece 120 in the mobile terminal 100 is particularly important.
In one embodiment, the earpiece 120 is fixed inside the mobile terminal 100 and disposed between the front sound outlet 111 and the rear sound outlet 112, the earpiece 120 includes a diaphragm (not shown in the figure), a front sound outlet channel 117 is disposed between the diaphragm and the front sound outlet 111, and the earpiece 120 further includes a magnetic steel (not shown in the figure), and the magnetic steel faces the rear sound outlet 116.
The earpiece 120 in this embodiment is arranged as a conventional loudspeaker, i.e. the vibrations generated by the diaphragm of the earpiece 120 form an audio signal which is transmitted to the user's ear. In the present embodiment, the front sound outlet 111 serves as a main sound outlet, and the user acquires audio information through the front sound outlet 111. In the mobile terminal 100, a vibrating diaphragm side of the earpiece 120 is opposite to the front sound outlet 111, a magnetic steel side is opposite to the rear sound outlet 112, a front sound outlet channel 117 for transmitting audio signals is formed between the vibrating diaphragm and the front sound outlet 111, and a rear sound outlet channel 116 is formed between the magnetic steel and the rear sound outlet 112.
In addition to the above-mentioned arrangement of the earpiece 120, the main component for achieving the purpose of the present disclosure of adjusting the audio amplitude of the sound outlet 112 is the micro-valve 130, and thus the arrangement of the micro-valve 130 in the mobile terminal 100 is also particularly important.
In one embodiment, the rear sound outlet 112 is disposed on the back of the mobile terminal 100 near the top end, the first side of the micro valve 130 faces the magnetic steel, and the second side of the micro valve 130 faces the rear sound outlet 112, wherein the amplitude of the audio signal output from the earpiece 120 to the rear sound outlet 112 is adjusted by adjusting the size of the opening of the micro valve 130.
The rear sound outlet 112 is arranged at the position, close to the top end, of the back surface of the mobile terminal 100, so that the situation that the rear sound outlet 112 is shielded by hands, a receiver similar to a conventional loudspeaker is formed, and the mutual offset of the audios of the rear sound outlet 112 and the front sound outlet 111 cannot be realized, so that the aim of weakening the audio transmitted from the front sound outlet 111 is fulfilled, and the confidentiality function cannot be effectively realized.
As described above, the size of the micro valve opening needs to be adjusted according to the distance of the person approaching, and the measurement of the distance of the person approaching is determined by the first ultrasonic signal reflected by the person approaching. The mobile terminal 100 needs to receive the reflected first ultrasonic signal and then perform computational analysis thereon, and thus a means for receiving the ultrasonic signal needs to be provided in the mobile terminal 100. In one embodiment, the mobile terminal 100 further includes: a first microphone 161 disposed on the back side 113 of the mobile terminal 100, wherein the ultrasonic processing engine 151 is electrically connected to the first microphone 161 via the audio codec 170.
The mobile terminal 100 receives the first ultrasonic signal through the first microphone 161, and thus, in the present embodiment, the first microphone 161 is disposed at the rear surface 113 so as to receive information of the approaching person around the mobile terminal in the maximum range. The received first ultrasonic signal is an analog signal, and the ultrasonic processing engine 151 needs to convert the first ultrasonic signal into a digital signal when performing calculation and analysis, so that the first microphone 161 decodes the first ultrasonic signal by the audio codec 170, that is, converts the analog signal into the digital signal, and then transmits the digital signal to the ultrasonic processing engine 151.
The mobile terminal 100 is provided with the rear sound outlet 112, which is more than one through hole communicated with the outside compared with the existing mobile terminal 100, so that the possibility that external dust enters the mobile terminal 100 is increased, and the performance of each part inside the mobile terminal is greatly influenced after the dust enters the mobile terminal.
In one embodiment, the mobile terminal 100 further includes: a dust screen 140 disposed between the micro valve 130 and the rear sound outlet 112.
By providing the dust screen 140, dust entering through the rear sound outlet 112 is effectively blocked, and the inside of the mobile terminal 100 is ensured to be clean.
As described above, the second ultrasonic wave is transmitted through the front sound outlet 111, and when the second ultrasonic wave is reflected back after encountering a person near the mobile terminal 100, the first ultrasonic signal is received through the first microphone 161 of the rear surface 113 of the mobile terminal 100. Likewise, the approach behavior of the user may be detected by using ultrasonic waves, so that the mobile terminal 100 may implement a screen locking function, thereby avoiding misoperation.
In one embodiment, the mobile terminal 100 further comprises a second microphone 162, the second microphone 162 being disposed on the top 114 of the mobile terminal 100.
After the second ultrasonic signal sent by the front sound outlet 111 is reflected by the user, the reflected ultrasonic signal is received by the second microphone 162, so as to judge the action of the user approaching the mobile terminal, and realize screen locking, so that the user is prevented from touching the touch screen by the facial skin when using the mobile terminal 100, and misoperation is avoided.
As described above, in order to prevent hands from touching the rear sound outlet 112 and even to block the rear sound outlet 112, the adjusting function of the audio transmitted from the front sound outlet 111 is lost, and the rear sound outlet 112 is provided at a position above the rear surface 113 of the mobile terminal 100. The first microphone 161 is used to receive the first ultrasonic signal reflected by the surrounding person, and if blocked, it affects the intensity of the first ultrasonic signal, thereby causing misjudgment of the distance of the person from the mobile terminal by the mobile terminal 100. In one embodiment, the first microphone 161 is disposed at an upper centered position on the back surface 113 of the mobile terminal 100.
The first microphone 161 is configured to receive the first ultrasonic signal, and to ensure that the received first ultrasonic signal is not affected, the first microphone 161 is disposed at a position on the back surface of the mobile terminal 100 that is not blocked, and in this embodiment, the first microphone 161 is disposed at a position on the back surface 113 that is centered and upper. For example, the upper center position of the back of the shell of the mobile phone is not blocked by hands and the like, so that the receiving of the audio signal is ensured.
In addition to the first microphone 161 and the rear sound outlet 112 being provided in a position centered above the rear surface, the position of the front sound outlet 111 is also important, for example, in a mobile phone, where the front sound outlet 111 is a handset of the mobile phone, and is typically provided above the screen. In the mobile terminal 100 of the present embodiment, the front sound outlet 111 transmits a second ultrasonic signal in addition to the audio signal for detecting the user and the person in various directions around the mobile terminal, and thus the installation position of the front sound outlet 111 is also important.
In one embodiment, the front sound outlet 111 is disposed at the interface of the top surface 114 and the front surface 115 of the mobile terminal 100, at the top, at the bottom, or at the front surface.
In general, the front sound outlet 111, for example, the earpiece of the mobile phone is disposed at the upper edge of the front face, and most of the second ultrasonic signals sent from the earpiece of the mobile phone are transmitted in the front direction, when it is detected whether the other directions around the mobile phone are close to each other, the first microphone 161 cannot receive the first ultrasonic signals because the second ultrasonic signals cannot be sent to the back face, and the function of detecting whether the people are close to each other cannot be achieved. In this embodiment, the front sound outlet hole adopts a size with a width not smaller than 0.5mm and a length larger than 10mm, and the sending of the second ultrasonic wave can achieve a better effect.
Fig. 5 is a usage scenario diagram illustrating a mobile terminal according to an exemplary embodiment of the present disclosure.
Referring to fig. 5, as an example, the second ultrasonic signal is transmitted from the front sound outlet 111, and the direction of transmitting the second ultrasonic signal may be from the front side to the rear side, or may be in various directions such as both sides of the mobile terminal 100, because the front sound outlet 111 is provided at the junction of the top surface 114 and the front surface 115. The second ultrasonic signal sent forward is reflected by the user P2, received by the second microphone 162 disposed on the top surface, and processed by the ultrasonic processing engine 151, and then the distance of the user P2 near the mobile terminal 100 is determined, and when the distance reaches a preset value, the screen is locked. After the second ultrasonic signal transmitted backward is reflected by the person P1 approaching backward of the mobile terminal 100, the first microphone 161 receives the first ultrasonic signal, and after processing by the ultrasonic processing engine 151, the distance of the surrounding person P1 approaching the mobile terminal is determined. When the distance reaches a preset value, a micro valve 130 adjusting instruction is sent to the earphone 120, the micro valve 130 is gradually opened as the distance is reduced, and the micro valve 130 is gradually opened as the distance is increased.
With the above structure, the mobile terminal is constructed to have a function of avoiding leakage of voice information of the user. By using the mobile terminal, the approach distance of surrounding people is sensed, and the ultrasonic processing engine transmits the adjusting instruction to the micro valve, so that the adjustment of the amplitude of the audio transmitted through the rear sound outlet is realized, the intensity of the audio output by the front sound outlet is adjusted, and the aim of avoiding sound leakage is fulfilled. The implementation method is as follows.
Fig. 6 is a flowchart illustrating a method of controlling an audio signal of a mobile terminal according to an exemplary embodiment of the present disclosure.
Referring to fig. 6, according to another aspect of the present disclosure, there is provided a method of controlling an audio signal of a mobile terminal, the mobile terminal being provided by the above-described embodiment, the method including: s100, adjusting the opening of the micro valve; s200, adjusting the amplitude of a second audio signal generated by the receiver and to be transmitted to the rear sound outlet through the micro valve by adjusting the size of the opening, and adjusting the intensity of a first audio signal generated by the receiver and to be transmitted to the front sound outlet.
The method for canceling the intensity of the first audio signal transmitted from the front sound outlet hole is realized by setting the amplitude of the second audio signal of the micro valve regulated back sound outlet hole, so that the audio leakage of the front sound outlet hole is weakened, the sound leakage is effectively prevented, and the information confidentiality is ensured. In an apparatus using the earpiece of this embodiment, such as a mobile phone, the front sound outlet of the earpiece is closely attached to the ear of the user, and the influence of the adjustment of the audio amplitude of the rear sound outlet on the audio transmitted from the front sound outlet to the ear is almost negligible, so that the call quality is ensured, and no external apparatus such as an earphone is needed. The earphone is not damaged, the problem of damage of other additional equipment is solved, the harm of ears and the like is not caused, and the personal health is protected.
In one embodiment, the aperture of the regulator micro valve comprises: receiving a first ultrasonic signal detected by the first microphone; inputting the ultrasonic signals into the ultrasonic processing engine for processing to obtain the human body distance; and adjusting the opening of the micro valve according to the human body distance and the preset value of the human body distance.
The first ultrasonic signals reflected by surrounding human bodies are received through the first microphone, the distance is compared with a preset human body distance preset value after the processing of the ultrasonic processing engine, and the opening of the micro valve is adjusted according to the comparison result. The method effectively realizes the method that the amplitude of the audio transmitted by the back sound outlet hole is regulated by the micro valve according to the distance of surrounding human bodies, thereby counteracting the information leakage of the front sound outlet hole to the outside and ensuring the confidentiality of the information.
In one embodiment, the adjusting the opening of the micro valve further comprises: and when the human body distance is smaller than the preset human body distance value, adjusting the opening of the micro valve to be larger. And when the human body distance is greater than or equal to the preset value of the human body distance, the opening of the micro valve is regulated to be smaller.
Specifically, comparing the obtained human body distance with a human body distance preset value, if the human body distance is smaller than the human body distance preset value, considering that the human body is approaching, thereby adjusting the opening of the micro valve to be larger, increasing the amplitude of the audio of the rear sound outlet, more counteracting the audio leaked from the front sound outlet, and gradually increasing the opening of the micro valve along with the decrease of the approaching distance of the human body; if the human body distance is greater than or equal to the human body distance preset value, the human body is considered to be far away, so that the opening of the micro valve is adjusted to be smaller, the amplitude of the audio of the rear sound outlet is reduced, the cancellation of the audio leaked from the front sound outlet is reduced, the opening of the micro valve is gradually reduced along with the increase of the human body distance, and the quality of the audio transmitted by the front sound outlet is ensured to the greatest extent.
In one embodiment, inputting the first ultrasonic signal into the ultrasonic processing engine for processing to obtain the human body distance comprises: recording a second point in time at which the ultrasonic processing engine controls the earpiece to generate a second ultrasonic signal; recording a first point in time when the first microphone detects the first ultrasonic signal; calculating a time difference between the second time point and the first time point; and calculating the human body distance based on the time difference.
And the distance between the surrounding person and the human body of the mobile terminal is judged by calculating the time duration of the first ultrasonic signal received by the first microphone after the second ultrasonic signal sent by the receiver is reflected by the surrounding person. The calculation method is simple, does not occupy too much resources of the mobile terminal, and does not influence the implementation of other functions of the mobile terminal.
In one embodiment, the method further comprises: transmitting the second digital ultrasonic signal generated by the ultrasonic processing engine and the third digital audio signal received from the mobile terminal to the audio codec; decoding the second digital ultrasonic signal and the third digital audio signal in the audio codec to obtain a second analog ultrasonic signal and a third analog audio signal; the second analog ultrasonic signal and the third analog audio signal are propagated to the outside of the earpiece through the front sound outlet.
In this embodiment, the ultrasonic signal generated by the ultrasonic processing engine is a digital signal, that is, the second digital ultrasonic signal, which needs to be converted into an analog signal before being transmitted through the front-out sound hole, and thus the second digital ultrasonic signal is transmitted to the audio codec for decoding, that is, signal conversion, and then the second analog ultrasonic signal is transmitted to the outside through the front-out sound hole. Similarly, the remote third digital audio signal received by the mobile terminal is converted into a third analog audio signal by the audio codec and then sent to the outside through the front sound outlet, so that the user can receive the audio signal sent by the remote terminal.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It is to be understood that the invention is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (13)
1. A mobile terminal, the mobile terminal comprising:
an earpiece that generates a first audio signal, a second audio signal, and a second ultrasonic signal;
a front sound outlet communicated with the earphone, the front sound outlet transmitting the first audio signal;
the rear sound outlet is communicated with the earphone through a rear sound outlet channel, and is arranged at a position, close to the top end, of the back surface of the mobile terminal and used for transmitting the second audio signal;
a first microphone that detects a first ultrasonic signal generated by reflection of the second ultrasonic signal by a surrounding human body;
the ultrasonic processing engine is electrically connected with the earphone through the audio coder-decoder, and acquires a human body distance according to a first ultrasonic signal and a second ultrasonic signal, wherein the human body distance is the distance between the mobile terminal and surrounding human bodies;
the micro valve is arranged at the rear sound outlet channel, and the opening of the micro valve can be adjusted;
when the human body distance is smaller than a preset value of the human body distance, the opening adjustment of the micro valve is enlarged, and the second audio signal and the first audio signal are offset.
2. The mobile terminal according to claim 1, wherein,
the earphone is fixed inside the mobile terminal and arranged between the front sound outlet and the rear sound outlet,
the earphone comprises a vibrating diaphragm, a front sound outlet channel is arranged between the vibrating diaphragm and the front sound outlet hole,
the earphone also comprises magnetic steel, and the magnetic steel faces the rear sound outlet channel.
3. The mobile terminal according to claim 2, wherein,
the first side of the micro valve faces the magnetic steel, the second side of the micro valve faces the rear sound outlet hole,
and the amplitude of the audio signal output to the rear sound outlet hole by the earphone is regulated by regulating the size of the opening of the micro valve.
4. The mobile terminal according to claim 1, wherein,
the first microphone is disposed on a back surface of the mobile terminal,
wherein the ultrasonic processing engine is electrically connected to the first microphone via the audio codec.
5. The mobile terminal of claim 1, wherein the mobile terminal further comprises:
the dustproof net is arranged between the micro valve and the rear sound outlet hole.
6. The mobile terminal according to claim 1, wherein,
the mobile terminal further comprises a second microphone, which is arranged on top of the mobile terminal.
7. The mobile terminal according to claim 4, wherein,
the first microphone is disposed at an upper centered position on a back surface of the mobile terminal.
8. The mobile terminal according to claim 1, wherein,
the front sound outlet holes are arranged at the juncture of the top surface and the front surface of the mobile terminal, the top, the bottom or the front surface.
9. A method of controlling an audio signal of a mobile terminal, characterized in that the mobile terminal is a mobile terminal according to any of claims 1-8, the mobile terminal comprising a first microphone, the first microphone being arranged on a back side of the mobile terminal, the method comprising:
adjusting the opening of the micro valve;
and adjusting the amplitude of a second audio signal generated by the receiver and to be transmitted to the rear sound outlet through the micro valve by adjusting the size of the opening, so as to adjust the intensity of a first audio signal generated by the receiver and to be transmitted to the front sound outlet.
10. The method of claim 9, wherein adjusting the aperture of the microvalve comprises:
receiving a first ultrasonic signal detected by the first microphone;
inputting the first ultrasonic signal into the ultrasonic processing engine for processing to obtain a human body distance;
and adjusting the opening of the micro valve according to the human body distance and the preset value of the human body distance.
11. The method of claim 10, wherein adjusting the aperture of the microvalve further comprises:
when the human body distance is smaller than the preset value of the human body distance, the open hole of the micro valve is adjusted to be larger,
and when the human body distance is greater than or equal to the preset value of the human body distance, the opening of the micro valve is regulated to be smaller.
12. The method of claim 10, wherein the inputting the first ultrasonic signal into the ultrasonic processing engine for processing to obtain a human body distance comprises:
recording a second point in time at which the ultrasonic processing engine controls the earpiece to generate a second ultrasonic signal;
recording a first point in time when the first microphone detects the first ultrasonic signal;
calculating a time difference between the second time point and the first time point;
and calculating the human body distance based on the time difference.
13. The method according to claim 9, wherein the method further comprises:
transmitting the second digital ultrasonic signal generated by the ultrasonic processing engine and the third digital audio signal received from the mobile terminal to the audio codec;
decoding the second digital ultrasonic signal and the third digital audio signal in the audio codec to obtain a second analog ultrasonic signal and a third analog audio signal;
the second analog ultrasonic signal and the third analog audio signal are propagated to the outside of the earpiece through the front sound outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910920131.4A CN112653780B (en) | 2019-09-26 | 2019-09-26 | Mobile terminal and method of controlling audio signal of mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910920131.4A CN112653780B (en) | 2019-09-26 | 2019-09-26 | Mobile terminal and method of controlling audio signal of mobile terminal |
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| JP2006148378A (en) * | 2004-11-18 | 2006-06-08 | Nec Corp | Mobile communication terminal and method of reducing leaked voice therefrom |
| CN106101350A (en) * | 2016-05-31 | 2016-11-09 | 维沃移动通信有限公司 | A kind of mobile terminal and call method thereof |
| CN107454491A (en) * | 2017-07-25 | 2017-12-08 | 维沃移动通信有限公司 | A kind of mobile terminal |
| CN108494918A (en) * | 2018-05-28 | 2018-09-04 | 维沃移动通信有限公司 | A kind of mobile terminal |
| CN108989514A (en) * | 2018-07-26 | 2018-12-11 | 维沃移动通信有限公司 | A kind of mobile terminal |
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| JP2017118375A (en) * | 2015-12-25 | 2017-06-29 | 京セラ株式会社 | Electronic equipment and sound output control method |
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| JP2006148378A (en) * | 2004-11-18 | 2006-06-08 | Nec Corp | Mobile communication terminal and method of reducing leaked voice therefrom |
| CN106101350A (en) * | 2016-05-31 | 2016-11-09 | 维沃移动通信有限公司 | A kind of mobile terminal and call method thereof |
| CN107454491A (en) * | 2017-07-25 | 2017-12-08 | 维沃移动通信有限公司 | A kind of mobile terminal |
| CN108494918A (en) * | 2018-05-28 | 2018-09-04 | 维沃移动通信有限公司 | A kind of mobile terminal |
| CN108989514A (en) * | 2018-07-26 | 2018-12-11 | 维沃移动通信有限公司 | A kind of mobile terminal |
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