CN110708620A - Special microphone for actively reducing noise of vehicle and ship - Google Patents
Special microphone for actively reducing noise of vehicle and ship Download PDFInfo
- Publication number
- CN110708620A CN110708620A CN201910982089.9A CN201910982089A CN110708620A CN 110708620 A CN110708620 A CN 110708620A CN 201910982089 A CN201910982089 A CN 201910982089A CN 110708620 A CN110708620 A CN 110708620A
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- China
- Prior art keywords
- shell
- microphone
- key
- rear shell
- front shell
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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
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
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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
- H04R1/08—Mouthpieces; Microphones; Attachments therefor
-
- 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 invention discloses a special microphone for actively reducing noise of vehicles and ships, which belongs to the technical field of voice communication equipment and comprises a front shell and a rear shell, wherein the front shell and the rear shell are provided with tiny through holes through screws, the front shell and the rear shell are connected with an O-shaped waterproof rubber ring, a sealing ring is extruded and fixed between the binding surfaces of the front shell and the rear shell, the surface of the rear shell is fixedly connected with a hook, microphone wires are inserted and connected with the bottoms of the binding surfaces of the front shell and the rear shell in a sealing way through a waterproof connecting structure and the through holes, the rear side of an inner cavity of the rear shell is fixedly connected with a secondary microphone, the left side of the binding surfaces of the front shell and the rear shell is provided with a PTT key through a through groove and a key waterproof rubber ring, the upper surface of the front shell is provided with a volume reduction key, a volume addition key and a switch key through the key waterproof rubber ring, and has the functions of actively reducing noise, muting on-, The device is convenient to use in the special noisy severe environment of the vehicle and ship station, is convenient to operate, and has market popularization value.
Description
Technical Field
The invention relates to the technical field of voice communication equipment, in particular to a special microphone for actively reducing noise of vehicles and ships.
Background
The microphone is a common voice communication device, exists as a terminal of an audio device, and is still difficult to meet requirements on a noisy environment, high-intensity use conditions, various severe environments with high requirements, large volume requirements and the like; particularly, the system is difficult to be applied to occasions such as outdoor or freight station command centers, emergency commands, vehicles and ships and the like, so that the system has the advantages that the noise reduction can be actively realized in a noisy environment, the microphone is pre-amplified, the power amplifier drives a loud speaker, and the volume is adjustable; muting the on-hook, and starting a power amplifier by self-recognition voice; the protective performance is good; the special microphone for actively reducing noise of the vehicles and ships is designed based on the characteristics of the microphone suitable for areas such as public emergency command centers, vehicles, ship stations and the like, so that the problems are solved.
Disclosure of Invention
The invention aims to provide a special microphone for actively reducing noise of vehicles and ships, which aims to solve the problems that the prior art needs to design a microphone which has a noisy environment, can actively reduce noise, pre-amplify a microphone, drives a loud speaker by a power amplifier and has adjustable volume; muting the on-hook, and starting a power amplifier by self-recognition voice; the protective performance is good; the microphone is suitable for public emergency command centers, vehicles, ship stations and other areas.
In order to achieve the purpose, the invention provides the following technical scheme: the special microphone with the active noise reduction function comprises a front shell and a rear shell, wherein the front shell and the rear shell are provided with fine through holes, the front shell and the rear shell are connected with an O-shaped waterproof rubber ring through screws, a sealing ring is fixedly extruded between the binding surfaces of the front shell and the rear shell, the surface of the rear shell is fixedly connected with a hook, microphone wires are inserted into the bottoms of the binding surfaces of the front shell and the rear shell in a sealing manner through a waterproof connecting structure and the through holes, a secondary microphone is fixedly connected to the rear side of an inner cavity of the rear shell, the left sides of the binding surfaces of the front shell and the rear shell are provided with PTT keys through a through groove and a key waterproof rubber ring, the upper surface of the front shell is provided with a volume reduction key, a volume addition key and an opening and closing key through the key waterproof rubber ring, the upper surface of the front shell is inlaid with an indicator light through the through hole in a sealing manner, the front side of the inner cavity of the front shell is fixedly connected, the circuit board is provided with a driving circuit, a signal amplification circuit, an active noise reduction circuit, a voice recognition and volume adjustment circuit, a first voltage reduction circuit, a second voltage reduction circuit and an indication control circuit, and is in signal connection with a microphone line, a secondary microphone, a PTT key, a volume reduction key, a volume addition key, a switch key, an indicator light, a loudspeaker and a main microphone.
Furthermore, the inner walls of the front shell and the rear shell are fixedly connected with mesh membranes.
Furthermore, the right surfaces of the front shell and the rear shell are provided with anti-skid grains.
Furthermore, the bottom of the binding surface of the front shell and the bottom of the back shell are hermetically inserted with microphone wires through a wire tail O-shaped waterproof rubber ring and a through hole.
Further, the hook is fixedly connected through a pin.
Furthermore, a horn waterproof film is tightly and fixedly connected to the front side of the horn.
Compared with the prior art, the invention has the beneficial effects that: the invention has the functions of active noise reduction, on-hook silence, one-key answering, self-recognition voice starting power amplification, volume adjustment and automatic power supply adjustment, and simultaneously has the advantages of energy-saving design, dust prevention and water prevention, convenient use in the special noisy severe environment of a vehicle and ship station, convenient operation and market popularization value.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a schematic diagram of a driving circuit of the present invention;
FIG. 4 is a schematic diagram of a signal amplification circuit of the present invention;
FIG. 5 is a schematic diagram of an active noise reduction circuit of the present invention;
FIG. 6 is a schematic diagram of a voice recognition and volume adjustment circuit according to the present invention;
FIG. 7 is a schematic diagram of a first buck circuit according to the present invention;
FIG. 8 is a schematic diagram of a second buck circuit according to the present invention;
FIG. 9 is a schematic diagram of the indicating control circuit of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1-front shell, 2-rear shell, 3-hook, 4-microphone line, 5-secondary microphone, 6-PTT key, 7-volume reduction key, 8-volume addition key, 9-switch key, 10-indicator light, 11-horn and 12-main microphone.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-9, the present invention provides a technical solution: a special microphone for actively reducing noise of vehicles and ships comprises a front shell 1 and a rear shell 2 with tiny through holes on the surfaces, wherein the front shell 1 and the rear shell 2 are connected with an O-shaped waterproof rubber ring through screws, a sealing ring is extruded and fixed between the binding surfaces of the front shell 1 and the rear shell 2, the surface of the rear shell 2 is fixedly connected with a hook 3, microphone lines 4 are inserted and connected at the bottoms of the binding surfaces of the front shell 1 and the rear shell 2 through a waterproof connecting structure and through holes in a sealing manner, a secondary microphone 5 is fixedly connected at the rear side of an inner cavity of the rear shell 2, a PTT key 6 is arranged at the left side of the binding surfaces of the front shell 1 and the rear shell 2 through a through groove and a key waterproof rubber ring, a volume reducing key 7, a volume adding key 8 and a switch key 9 are arranged on the upper surface of the front shell 1 through the key waterproof rubber ring, an indicating lamp 10 is embedded in the upper surface of the front shell 1 through the through holes in a sealing manner, the circuit board is fixedly connected in a sealed cavity formed by the front shell 1 and the rear shell 2, a driving circuit, a signal amplifying circuit, an active noise reduction circuit, a voice recognition and volume adjusting circuit, a first voltage reduction circuit, a second voltage reduction circuit and an indication control circuit are arranged on the circuit board, and the circuit board is in signal connection with a microphone line 4, a secondary microphone 5, a PTT key 6, a volume reduction key 7, a volume addition key 8, a switch key 9, an indicator light 10, a loudspeaker 11 and a main microphone 12.
Wherein, the inner walls of the front shell 1 and the rear shell 2 are fixedly connected with mesh films, so that the waterproof and dustproof effects are improved.
The right surfaces of the front shell 1 and the rear shell 2 are provided with anti-slip lines, so that the front shell and the rear shell are convenient to hold tightly and prevent from falling.
The bottom of the binding surface of the front shell 1 and the back shell 2 is sealed and spliced with the microphone line 4 through the O-shaped waterproof rubber ring at the tail end and the through hole, and the O-shaped waterproof rubber ring at the tail end is sleeved on the end part of the microphone line 4 and is sealed and spliced in the inner cavity of the through hole.
The hook 3 is fixedly connected through a pin, so that the installation and the replacement are convenient.
The front side of the horn 11 is tightly and fixedly connected with a horn waterproof membrane, so that the service life of the horn is prolonged.
After the microphone wire 4 is communicated with external equipment, the microphone is turned on by long pressing of a switch key 9 (such as a key K0 on a picture 4), if the microphone is on a hanging rack, the microphone is muted and is in a standby state, if a key K4 in a picture 3 is positioned at the rear side inside the hook 3 and is equivalent to a switch formed by the hook 3 and the hanging rack, and if the microphone is hung up, the key K4 is pressed down, and an output signal of MIC + is connected with the ground and muted through two NMOS tubes 2SK1824 of Q2 and Q3;
after off-hook, when the PTT key 6 and the key K0 are pressed and kept, or the switch ampere key 9 is pressed for a short time, namely in the PTT mode, as shown in FIG. 4, when the key K0 is pressed all the time, the MOS transistor 2SJ347 of the Q1 is conducted; when the switch key 9 is pressed for a short time, the MOS tube 2SK1824 of the Q4 is conducted; in both states, the enabling end EN of the U6 analog switch SGM3001 is enabled, the normally open NO of the U6 is closed, and the audio signal output by the U5 audio amplifier Max9812 is emitted;
in order to actively reduce noise in a noisy environment, a front microphone and a rear microphone are arranged, the front microphone and the rear microphone are respectively a main microphone 12 and a secondary microphone 5, as shown in fig. 5, the microphones are respectively marked as MIC1 and MIC2, the two microphones are respectively biased by voltage of M3V3, collected audio signals are filtered and then respectively input to the positive and negative input ends of a U4 operational amplifier 3404A, operational amplifier feedback is adjusted, output signals are subtraction of input signals, so that environmental sounds of 2 microphones are removed together, voice of a front microphone 1 (main microphone 12) is clearer, and a signal MICO subjected to noise reduction processing is sent to an audio amplifier Max9812 of a U5 to be amplified and then output to a U6 for controlling output; secondly, the standby state can receive sound information transmitted from the outside in real time, as shown in fig. 6, the U1 voice sensor NJM2072 monitors the external voice all the time, once the voice is monitored, a low level is output to enable the U7 power amplifier MIX2007, an audio signal amplified by the U7 is sent to the 3w loudspeaker 11 (namely, SPK) in a differential mode to make sound, the volume of the loudspeaker can be controlled by a volume adding key 8 (namely, K2) or a volume reducing key 7 (namely, K3), a U9 digital potentiometer AD5228 is adjusted, so that the preceding stage input of the power amplifier U7 is adjusted, the volume of the loudspeaker is adjusted to a comfortable degree, the U9 receives continuous keys to continuously adjust the volume, if the long key exceeds 1 second, the volume is automatically adjusted at 4 grids per second and at a speed, and the volume adjustable range is 32 grids in total;
by providing a single direct current 12V power supply externally, firstly, the DCDC (SX2106) of U1 is used for voltage reduction and stabilization to a 5V power supply for power supply, as shown in FIG. 7, and then the LDO (SGM2036) of U9 is used for adjusting the voltage to 3.3V for power supply, and the voltage is respectively used for circuits, as shown in FIG. 8;
as shown in fig. 9, the single-chip microcomputer PIC12F675 of U10 controls the switch key K1 and the indicator light 10 (i.e., H0), and when K1 presses 5S for a long time, the switch is turned on and off (GP5 reverses); when the computer is in a power-on state, when K1 is pressed for a short time, a PTT mode is started by a single key (GP4 is at a low level), the GP5 enables the U8 analog switch SGM3001, when the analog switch is at a high level, the analog switch is normally opened, 5V main power output PAVDD is used by the whole circuit, LDO (RT9193) of U11 outputs 3.3V special for the singlechip and peripheral circuits, when a winding wire is connected with an external power supply, the singlechip is electrified and started to control other circuits, the indicator lamp 10 indicates the power-on and call states, and flashes once every 10 seconds after the startup, and the GP2 of the singlechip U10 controls the computer.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (6)
1. The special microphone of making an uproar falls in car and boat initiative, including preceding shell (1) and backshell (2) of the tiny through-hole of surface area, its characterized in that: the sound volume adjusting device is characterized in that the front shell (1) and the rear shell (2) are connected through screws and O-shaped waterproof rubber rings, a sealing ring is fixedly extruded between the binding surfaces of the front shell (1) and the rear shell (2), a hook (3) is fixedly connected to the surface of the rear shell (2), a microphone line (4) is spliced in the binding surface bottoms of the front shell (1) and the rear shell (2) through a waterproof connecting structure and through hole sealing, a secondary microphone (5) is fixedly connected to the rear side of the inner cavity of the rear shell (2), an indicator light (10) is inlaid in the left side of the binding surfaces of the front shell (1) and the rear shell (2) through a through groove and a key waterproof rubber ring, a volume reducing key (7), a volume adding key (8) and a switch key (9) are arranged on the upper surface of the front shell (1) through the through hole sealing, a main microphone (12) and a loudspeaker (11) are fixedly connected to the front side of the inner cavity of the front shell (1) from top to bottom, fixedly connected with circuit board in the sealed cavity that preceding shell (1) and backshell (2) are constituteed, be provided with drive circuit, signal amplification circuit, the circuit of making an uproar, speech recognition and volume control circuit, first step-down circuit, second step-down circuit and instruction control circuit on the circuit board, circuit board and microphone line (4), inferior miaow head (5), PTT key (6), volume subtract button (7), volume add button (8), switch button (9), pilot lamp (10), loudspeaker (11) and main miaow head (12) signal connection.
2. The special microphone for actively reducing noise of vehicles and ships as claimed in claim 1, wherein: the inner walls of the front shell (1) and the rear shell (2) are fixedly connected with mesh membranes.
3. The special microphone for actively reducing noise of vehicles and ships as claimed in claim 1, wherein: the right surfaces of the front shell (1) and the rear shell (2) are provided with anti-skid lines.
4. The special microphone for actively reducing noise of vehicles and ships as claimed in claim 1, wherein: the bottom of the binding surface of the front shell (1) and the bottom of the rear shell (2) are hermetically inserted with microphone wires (4) through a wire tail O-shaped waterproof rubber ring and a through hole.
5. The special microphone for actively reducing noise of vehicles and ships as claimed in claim 1, wherein: the hook (3) is fixedly connected through a pin.
6. The special microphone for actively reducing noise of vehicles and ships as claimed in claim 1, wherein: the front side of the horn (11) is tightly and fixedly connected with a horn waterproof membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910982089.9A CN110708620A (en) | 2019-10-16 | 2019-10-16 | Special microphone for actively reducing noise of vehicle and ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910982089.9A CN110708620A (en) | 2019-10-16 | 2019-10-16 | Special microphone for actively reducing noise of vehicle and ship |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110708620A true CN110708620A (en) | 2020-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910982089.9A Pending CN110708620A (en) | 2019-10-16 | 2019-10-16 | Special microphone for actively reducing noise of vehicle and ship |
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| CN (1) | CN110708620A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103036585A (en) * | 2012-11-01 | 2013-04-10 | 深圳市欧标实业发展有限公司 | Interphone provided with waterproof structures |
| CN206272612U (en) * | 2016-12-28 | 2017-06-20 | 深圳市南北通通信技术有限公司 | One kind patrol horseback police's communicator |
| CN206879104U (en) * | 2017-04-21 | 2018-01-12 | 南京耀泽电子科技有限公司 | A kind of voice radio device that full duplex packet communication for coordination ability is provided |
| CN108449105A (en) * | 2018-05-30 | 2018-08-24 | 南京耀泽电子科技有限公司 | The voice shoulder miaow device and its means of communication of full duplex grouping communication for coordination ability are provided |
| CN208158858U (en) * | 2018-04-09 | 2018-11-27 | 深圳市晨讯达科技有限公司 | A kind of diamylose noise reduction words miaow |
-
2019
- 2019-10-16 CN CN201910982089.9A patent/CN110708620A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103036585A (en) * | 2012-11-01 | 2013-04-10 | 深圳市欧标实业发展有限公司 | Interphone provided with waterproof structures |
| CN206272612U (en) * | 2016-12-28 | 2017-06-20 | 深圳市南北通通信技术有限公司 | One kind patrol horseback police's communicator |
| CN206879104U (en) * | 2017-04-21 | 2018-01-12 | 南京耀泽电子科技有限公司 | A kind of voice radio device that full duplex packet communication for coordination ability is provided |
| CN208158858U (en) * | 2018-04-09 | 2018-11-27 | 深圳市晨讯达科技有限公司 | A kind of diamylose noise reduction words miaow |
| CN108449105A (en) * | 2018-05-30 | 2018-08-24 | 南京耀泽电子科技有限公司 | The voice shoulder miaow device and its means of communication of full duplex grouping communication for coordination ability are provided |
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Application publication date: 20200117 |