CN106412748B - Device and method for eliminating earphone plosive - Google Patents
Device and method for eliminating earphone plosive Download PDFInfo
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- CN106412748B CN106412748B CN201610978808.6A CN201610978808A CN106412748B CN 106412748 B CN106412748 B CN 106412748B CN 201610978808 A CN201610978808 A CN 201610978808A CN 106412748 B CN106412748 B CN 106412748B
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- 238000012423 maintenance Methods 0.000 abstract description 4
- 101100236764 Caenorhabditis elegans mcu-1 gene Proteins 0.000 description 16
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- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- H04R1/1083—Reduction of ambient noise
-
- 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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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
Abstract
The invention relates to a device and a method for eliminating the pop noise of an earphone, wherein the device comprises a micro control unit, a power supply unit, a power amplifier, a normally closed switch, a left channel loudspeaker unit and a right channel loudspeaker unit; the micro control unit controls the power supply unit to supply or cut off power to the power amplifier, and controls the first pair of ports and the second pair of ports of the power amplifier to be communicated with the normally closed switch, or the first pair of ports are communicated with the positive and negative ends of the right channel loudspeaker unit, and the second pair of ports are communicated with the positive and negative ends of the left channel loudspeaker unit. The micro control unit is used for controlling the output of the earphone PA to be communicated with the horn unit or the normally closed switch when the power is on or off, so that pulses generated at the moment of the power on or off of the PA are prevented from being directly transmitted to the horn unit, pop sound generated by the earphone is eliminated, and user experience is improved; the device is simple and easy to realize, and reduces maintenance cost.
Description
Technical Field
The invention belongs to the technical field of communication, and particularly relates to a device and a method for eliminating plosive generated when a headset power amplifier is powered on or powered off.
Background
Headphones are a pair of conversion units that accept electrical signals from a media player or receiver and convert them into audible sound waves using a speaker (e.g., a horn) positioned proximate the ear. Generally, the horn units are divided into a left channel horn unit and a right channel horn unit. In an acoustic system, when a power amplifier (i.e., PA) driving a speaker in an earphone is powered up or powered down instantaneously, an upward or downward instantaneous pulse is usually generated at an output end of the power amplifier, and the instantaneous pulse is directly transmitted to the speaker, so that the speaker generates a Pop sound (i.e., pop sound) to affect user experience.
Disclosure of Invention
The invention provides a device and a method for eliminating the Pop noise of an earphone, wherein the micro-control unit is used for controlling the output of the earphone PA to be communicated with a horn unit or a normally closed switch when the power is on or off, so that the pulse generated at the moment of the power on or off of the PA is prevented from being directly transmitted to the horn unit, the Pop noise generated by the earphone is eliminated, and the user experience is improved; the device is simple and easy to realize, and reduces maintenance cost.
In order to solve the technical problems, the invention provides the following technical scheme:
the device for eliminating the earphone plosive is characterized by comprising a micro control unit, a power supply unit, a power amplifier, a normally closed switch, a left channel loudspeaker unit and a right channel loudspeaker unit; the micro control unit controls the power supply unit to supply or cut off power to the power amplifier, and controls the first pair of ports and the second pair of ports of the power amplifier to be communicated with the normally closed switch, or the first pair of ports are communicated with the positive and negative ends of the right channel loudspeaker unit, and the second pair of ports are communicated with the positive and negative ends of the left channel loudspeaker unit.
Further, in order to realize that the micro-control unit controls the power amplifier to be communicated with the normally closed switch or the left channel loudspeaker unit and the right channel loudspeaker unit, the enabling end of the micro-control unit is communicated with the control end of the normally closed switch and is used for controlling the on and off of the normally closed switch.
Further, the normally closed switch is a multi-way normally closed switch; one of the normally closed switches and the right channel horn unit of the multi-way normally closed switch are connected in parallel between the first pair of ports, and the other normally closed switch and the left channel horn unit of the multi-way normally closed switch are connected in parallel between the second pair of ports. Wherein the multi-way normally-closed switch is a two-way normally-closed switch.
As another alternative to the normally closed switch, the normally closed switch includes a first multi-way normally closed switch and a second multi-way normally closed switch; one of the first multipath normally closed switches is connected in parallel with the right channel horn unit between the first pair of ports; one of the second multipath normally closed switches is connected in parallel with the left sound channel horn unit between the second pair of ports; the enabling end of the micro control unit is communicated with the control end of the first multi-way normally-closed switch and the control end of the second multi-way normally-closed switch.
The invention also relates to a method for eliminating the earphone plosive by using the device for eliminating the earphone plosive, which is characterized by comprising a power amplifier power-on mode and a power amplifier power-off mode, wherein the power amplifier power-on mode comprises the following steps of: the micro control unit controls the power supply unit to electrify the power amplifier; when the power amplifier feeds back a signal with stable output end voltage to the micro control unit, the enabling end of the micro control unit is enabled to control the first pair of ports of the power amplifier to be communicated with the positive and negative ends of the right channel loudspeaker unit, and the second pair of ports to be communicated with the positive and negative ends of the left channel loudspeaker unit; the power amplifier power down mode comprises the following steps: the micro control unit receives a power-down instruction of the power amplifier and controls to stop outputting the audio stream; the micro control unit controls the first pair of ports and the second pair of ports of the power amplifier to be communicated with the normally closed switch; the micro control unit controls the power supply unit to stop supplying power to the power amplifier.
Compared with the prior art, the invention has the advantages that: before the PA is electrified, the normally closed switches are closed, so that the left channel loudspeaker unit and the right channel loudspeaker unit are in short circuit, the first pair of ports and the second pair of ports of the PA are communicated with the normally closed switches, and the PA and the normally closed switches form a loop; if the PA needs to be powered on, the micro-control unit controls the power supply unit to supply power to the PA, and instant pulse generated during the power on of the PA is discharged in the loop and cannot be transmitted to the loudspeaker unit, so that Pop sound generated during the power on of the PA is eliminated; when the voltage on the PA is stable, the micro-control unit controls the normally closed switch to be switched off, so that a first pair of ports of the PA are communicated with the positive and negative ends of the right channel loudspeaker unit, a second pair of ports are communicated with the positive and negative ends of the left channel loudspeaker unit, and the loudspeaker unit enters normal operation; if the PA needs to be powered off, the micro-control unit controls the normally closed switch to be closed so as to enable the horn unit to be short-circuited, so that the PA and the normally closed switch form a loop, and at the moment, if the micro-control unit controls the power supply unit to power off the PA, the generated instant pulse is also discharged in the loop and cannot be transmitted to the horn unit, pop sound generated when the PA is powered off is eliminated, and user experience is improved; the device and the method are simple and easy to realize, and the maintenance cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description will be given below of the drawings required for the embodiments of the present invention or the description of the prior art, and it is obvious that the drawings described below are some embodiments of the present invention, and that other drawings may be obtained according to these drawings without the need for inventive effort for a person skilled in the art.
Fig. 1 is a schematic circuit diagram of an apparatus for eliminating pop noise of an earphone according to the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of 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 described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to prevent the PA from being directly communicated with the horn unit at the power-on or power-off moment, so that the instant pulse is not transmitted to the horn unit, thereby achieving the purpose of eliminating the Pop sound. As shown in fig. 1, the device for eliminating the plosive sound of the earphone of the present embodiment includes a micro control unit 1, a power supply unit 2, a PA3, a normally closed switch 4, a right channel speaker unit 5 and a left channel speaker unit 6; the micro control unit 1 controls the power supply unit 2 to supply or cut off power to the PA3, and controls the first pair of ports spk_r+, spk_r-and the second pair of ports spk_l+, spk_l-of the PA3 to be all communicated with the normally closed switch 4, or the first pair of ports spk_r+, spk_r-to be communicated with both the positive and negative poles of the right channel speaker unit spk_r5, and the second pair of ports spk_l+, spk_l-to be communicated with both the positive and negative poles of the left channel speaker unit spk_l6. In this embodiment, the normally closed switch 4 is a two-way analog switch, i.e., two input terminals A1 and A2, two output terminals B1 and B2, and one CONTROL terminal CONTROL.
Specifically, as shown in fig. 1, the enable terminal spk_en of the MCU 1 CONTROLs the closing and opening of the two pairs of switches A1B1 and A2B2 of the normally closed switch 4, the CONTROL terminal CONTROL of the normally closed switch 4 is communicated with the enable terminal spk_en of the MCU 1, and when the enable terminal spk_en is at a low level, the CONTROL terminal CONTROL of the normally closed switch 4 is also at a low level, so that the two pairs of switches A1B1 and A2B2 of the normally closed switch 4 are in a closed state; when the enable terminal spk_en is at a high level, the CONTROL terminal CONTROL of the normally closed switch 4 is also at a high level, so that the two pairs of switches A1B1 and A2B2 of the normally closed switch 4 are in an off state. Before PA3 is powered on, the enable terminal spk_en of MCU 1 is at low level, switches A1B1 and A2B2 of normally closed switch 4 are both closed, so that the right channel speaker unit spk_r5 and the left channel speaker unit spk_l6 are short-circuited, the spk_r+ port of the first pair of ports spk_r+, spk_r-of PA3 is in communication with input terminal A1 of normally closed switch 4, and the spk_r-port is in communication with output terminal B1 of normally closed switch 4, while the spk_l+ port of the second pair of ports spk_l+, spk_l-of PA3 is in communication with input terminal A2 of normally closed switch 4, and the spk_l-port is in communication with output terminal B2 of normally closed switch 4, at this time, since both pairs of switches A1B1 and A2B2 of normally closed switch 4 are closed, a discharge loop is formed with PA 3. When the PA3 needs to be powered on, the enabling end pa_power_en of the MCU 1 outputs a high level, and drives the POWER supply unit 2 to supply POWER to the PA3 through the interface pa_power, at this time, the enabling end spk_en of the MCU 1 still outputs a low level, and the normally closed switch 4 still makes the right channel speaker unit spk_r5 and the left channel speaker unit spk_l6 short-circuited, so that the pulse generated in the moment of POWER on of the PA3 is discharged through the discharge loop formed by the PA3 and the switches A1B1 and A2B2, and is not delivered to the speaker unit, thereby avoiding Pop sound generated due to POWER on of the PA 3. When the MCU 1 receives a signal that the output voltage of the PA3 is stabilized, the enabling end SPK_EN is controlled to output a high level, the switches A1B1 and A2B2 of the normally closed switch 4 are both disconnected, so that the port SPK_R+ of the PA3 is communicated with the positive electrode of the right channel speaker unit SPK_R5, the port SPK_R-is communicated with the negative electrode of the right channel speaker unit SPK_R5, the port SPK_L+ is communicated with the positive electrode of the left channel speaker unit SPK_L6, the port SPK_L-is communicated with the negative electrode of the left channel speaker unit SPK_L6, and the speaker unit enters normal operation. When the PA3 needs to be powered down, when the MCU 1 receives an instruction for powering down the PA3, control to stop transmitting an audio stream to the PA3 to pause music, then the enable end spk_en of the MCU 1 outputs a low level, both the two pairs of switches A1B1 and A2B2 of the normally closed switch 4 are controlled to be closed, so that the right channel speaker unit spk_r5 and the left channel speaker unit spk_l6 are short-circuited, the normally closed switch 4 and the PA3 form a discharge loop, then the enable end pa_power_en is controlled to output a low level by the MCU 1, the POWER supply unit 2 is driven to stop supplying POWER to the PA3 to cause the PA3 to be powered down, and an instant pulse generated when the PA3 is powered down is discharged through the discharge loop and is not transmitted to the speaker unit due to the existence of the discharge loop, so that Pop sound generated due to the PA3 POWER down is avoided. Thereafter, the MCU 1 may control to turn off the power switch of the entire system, so that the entire system is powered off, and the shutdown is completed.
As another alternative of the two-way normally-closed switch 4, the normally-closed switch 4 may be a multi-way normally-closed switch (not shown) of more than two ways, one of which may be used as the switch A1B1 of the normally-closed switch 4 of the present embodiment, the other of which may be used as the switch A2B2 of the normally-closed switch 4 of the present embodiment, and the CONTROL end of the multi-way normally-closed switch may be used as the CONTROL end CONTROL of the normally-closed switch 4 of the present embodiment. Alternatively, the normally-closed switch 4 may include a first multi-way normally-closed switch (not shown), one of which may be used as the switch A1B1 of the normally-closed switch 4, and a second multi-way normally-closed switch (not shown), one of which may be used as the switch A2B2 of the normally-closed switch 4, and both the CONTROL end of the first multi-way normally-closed switch and the CONTROL end of the second multi-way normally-closed switch may be used as the CONTROL end CONTROL of the normally-closed switch 4 of the present embodiment. And both are in communication with the enable terminal spk_en of the MCU 1 so as to control the first and second multi-way normally-closed switches simultaneously.
The invention also relates to a method for eliminating the earphone plosive by using the device for eliminating the earphone plosive, which comprises a PA3 power-on mode and a PA3 power-off mode, wherein the implementation methods of the PA3 power-on mode and the PA3 power-off mode are as described above and are not repeated herein.
According to the device and the method for eliminating the earphone Pop noise, before the power-on of the PA3, as the horn unit is short-circuited due to the closing of the switches A1B1 and A2B2 of the normally closed switch 4, the PA3 and the normally closed switch 4 form a discharge loop, when the MCU 1 controls the power supply unit 2 to supply power to the PA3, pulses generated at the moment of power-on of the PA3 are discharged through the discharge loop and cannot be transmitted to the horn unit, pop noise generated at the moment of power-on of the PA is eliminated, and after the voltage of the PA3 is stable, the enabling end SPK_EN of the MCU 1 outputs a high level, so that the switches A1B1 and A2B2 of the normally closed switch 4 are both disconnected, a first pair of ports SPK_R+ and SPK_R5 of the PA3 are communicated with the positive and negative ends of the right channel horn unit SPK_R5, a second pair of ports SPK_L+ and SPK_L-are communicated with the positive and negative ends of the left channel horn unit SPK_L6, and the horn unit enters normal operation; when the PA3 is required to be powered down, the MCU 1 drives the enabling end SPK_EN to output a low level according to a power-down instruction of the PA3, and the switches A1B1 and A2B2 of the normally closed switch 4 are both closed, so that the horn unit is short-circuited, and the PA3 and the normally closed switch 4 form a discharge loop, so that instant pulse generated when the MCU 1 controls the power supply unit 2 to power down the PA3 is discharged in the discharge loop and cannot be transmitted to the horn unit, pop sound generated when the PA3 is powered down is eliminated, and user experience is improved; the device and the method are realized by adding the output pin SPK_EN of the MCU 1 and the normally closed switch 4 controlled by the pin SPK_EN, and are convenient and simple and reduce the maintenance cost.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the 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 scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. The device for eliminating the earphone plosive is characterized by comprising a micro control unit, a power supply unit, a power amplifier, a normally closed switch, a left channel loudspeaker unit and a right channel loudspeaker unit; the micro control unit controls the power supply unit to supply or cut off power to the power amplifier, and controls the first pair of ports and the second pair of ports of the power amplifier to be communicated with the normally closed switch, or the first pair of ports are communicated with the positive and negative ends of the right channel loudspeaker unit, and the second pair of ports are communicated with the positive and negative ends of the left channel loudspeaker unit;
when the power amplifier is powered on or powered off, the normally closed switch is in short circuit with the left channel loudspeaker unit and the right channel loudspeaker unit, and the power amplifier and the normally closed switch form a discharge loop; the enabling end of the micro control unit is communicated with the control end of the normally closed switch and is used for controlling the normally closed switch to be closed and opened;
when the enabling end is at a low level, the control end of the normally closed switch is at a low level, so that the normally closed switch is in a closed state, and when the enabling end is at a high level, the control end of the normally closed switch is at a high level, so that the normally closed switch is in an open state;
when the power amplifier feeds back the signal with stable output end voltage to the micro control unit, the enabling end of the micro control unit is enabled to control the first pair of ports of the power amplifier to be communicated with the positive and negative ends of the right channel loudspeaker unit, and the second pair of ports to be communicated with the positive and negative ends of the left channel loudspeaker unit.
2. The device for eliminating the pop noise of the earphone of claim 1, wherein the normally closed switch is a multi-path normally closed switch; one of the normally closed switches and the right channel horn unit of the multi-way normally closed switch are connected in parallel between the first pair of ports, and the other normally closed switch and the left channel horn unit of the multi-way normally closed switch are connected in parallel between the second pair of ports.
3. The device for eliminating the pop noise of the earphone of claim 2, wherein the multi-way normally-closed switch is a two-way normally-closed switch.
4. The device for eliminating the pop noise of the earphone of claim 1, wherein the normally closed switch comprises a first multi-way normally closed switch and a second multi-way normally closed switch; one of the first multipath normally closed switches is connected in parallel with the right channel horn unit between the first pair of ports; one of the second multipath normally closed switches is connected in parallel with the left sound channel horn unit between the second pair of ports; the enabling end of the micro control unit is communicated with the control end of the first multi-way normally-closed switch and the control end of the second multi-way normally-closed switch.
5. A method for eliminating the plosive sound of the earphone by using the device for eliminating plosive sound of the earphone according to any one of claims 1 to 4, wherein the method comprises a power amplifier power-on mode and a power amplifier power-off mode,
the power amplifier power-on mode includes the steps of:
the micro control unit controls the power supply unit to electrify the power amplifier;
at the moment of power-on, the micro-control unit controls the first pair of ports and the second pair of ports of the power amplifier to be communicated with the normally closed switch, so that the right channel horn unit and the left channel horn unit are short-circuited;
when the power amplifier feeds back a signal with stable output end voltage to the micro control unit, the enabling end of the micro control unit is enabled to control the first pair of ports of the power amplifier to be communicated with the positive and negative ends of the right channel loudspeaker unit, and the second pair of ports to be communicated with the positive and negative ends of the left channel loudspeaker unit;
the power amplifier power down mode comprises the following steps:
the micro control unit receives a power-down instruction of the power amplifier and controls to stop outputting the audio stream;
the micro control unit controls the first pair of ports and the second pair of ports of the power amplifier to be communicated with the normally closed switch, and short-circuiting the right channel loudspeaker unit and the left channel loudspeaker unit;
the micro control unit controls the power supply list to stop supplying power to the power amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610978808.6A CN106412748B (en) | 2016-11-08 | 2016-11-08 | Device and method for eliminating earphone plosive |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610978808.6A CN106412748B (en) | 2016-11-08 | 2016-11-08 | Device and method for eliminating earphone plosive |
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| CN106412748A CN106412748A (en) | 2017-02-15 |
| CN106412748B true CN106412748B (en) | 2024-04-09 |
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| CN201610978808.6A Active CN106412748B (en) | 2016-11-08 | 2016-11-08 | Device and method for eliminating earphone plosive |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101309071A (en) * | 2007-05-18 | 2008-11-19 | 展讯通信（上海）有限公司 | Apparatus for inhibiting transient noise of audio power amplifier |
| CN201898599U (en) * | 2010-11-30 | 2011-07-13 | 东莞宇龙通信科技有限公司 | Circuit capable of eliminating POP noise and mobile terminal |
| CN204014030U (en) * | 2014-06-24 | 2014-12-10 | 比亚迪股份有限公司 | Eliminate the circuit of pop noise |
| CN204031429U (en) * | 2014-06-24 | 2014-12-17 | 比亚迪精密制造有限公司 | Eliminate the circuit of pop noise |
| CN206117970U (en) * | 2016-11-08 | 2017-04-19 | 歌尔科技有限公司 | Eliminate device of earphone plosive |
-
2016
- 2016-11-08 CN CN201610978808.6A patent/CN106412748B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101309071A (en) * | 2007-05-18 | 2008-11-19 | 展讯通信（上海）有限公司 | Apparatus for inhibiting transient noise of audio power amplifier |
| CN201898599U (en) * | 2010-11-30 | 2011-07-13 | 东莞宇龙通信科技有限公司 | Circuit capable of eliminating POP noise and mobile terminal |
| CN204014030U (en) * | 2014-06-24 | 2014-12-10 | 比亚迪股份有限公司 | Eliminate the circuit of pop noise |
| CN204031429U (en) * | 2014-06-24 | 2014-12-17 | 比亚迪精密制造有限公司 | Eliminate the circuit of pop noise |
| CN206117970U (en) * | 2016-11-08 | 2017-04-19 | 歌尔科技有限公司 | Eliminate device of earphone plosive |
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| CN106412748A (en) | 2017-02-15 |
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