CN200997680Y - Multifunctional sound source processor for ear muffs - Google Patents
Multifunctional sound source processor for ear muffs Download PDFInfo
- Publication number
- CN200997680Y CN200997680Y CN 200620137060 CN200620137060U CN200997680Y CN 200997680 Y CN200997680 Y CN 200997680Y CN 200620137060 CN200620137060 CN 200620137060 CN 200620137060 U CN200620137060 U CN 200620137060U CN 200997680 Y CN200997680 Y CN 200997680Y
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Abstract
A multifunctional sound source treater for ear muff is composed of a pickup unit (1), an analog-to-digital convert unit (2), a digital-to-analog convert unit (3), a monolithic processor (4), a volume control unit (7), an amplifier (8) and a loudspeaker (9); the output terminal of the pickup unit (1) is connected with the input terminal of the analog-to-digital convert unit (2), of which the output terminals are connected with the input terminal of the digital-to-analog convert unit (3) and the monolithic processor (4); the output terminal of the digital-to-analog convert unit (3) is coupled with the volume control unit (7); the monolithic processor (4) is connected with the control terminal of the digital-to-analog convert unit (3), for controlling the turn-off or strobe by output control signal; the output terminal of the amplifier (8) is connected with the loudspeaker (9).
Description
[technical field]
The utility model relates to a kind of electronic installation.
[background technology]
General existing hearing conservation earmuff is divided into two kinds of active formula and passive types, and the passive type earphone does not have any electronic circuit, purely removes to intercept external sound with this body structure of earmuff, to reach to the protection auditory effect.Passive earphone can not distinguish whether noise of external sound, all external sound all can be intercepted decay.Active formula earphone then has electronic circuit, and whether can detect external sound too high, does not reach decibel level to noise as external sound, and then earphone itself can amplify external sound, and the loudspeaker playback in earmuff makes the wearer still can know and hears external sound; When external sound reached the decibel level of noise, the signal that leads to audio frequency amplifier then can be decayed or turn-off to earphone, reaches to the effect of the protection wearer sense of hearing.
The audio signal processor that active formula hearing conservation earmuff is adopted all is to adopt gain controlling integrated circuit or the realization of analog signal wave detector in order to the circuit part of detecting audio signal size, by field effect transistor or triode control audio signal is done decay or shutoff again.Its shortcoming is to enter before gain controlling integrated circuit or wave detector in audio signal, must amplify the received audio frequency of microphone, again must field effect transistor or switch module control volume such as triode, cause employed assembly many, and audio analog signals must just export loudspeaker to through multiplex assembly, is disturbed easily and causes distortion.
In addition, no matter the wearer uses active or passive earmuff, will not hear under high noise environments under distance that other people exist certain difficulty, the particularly the other side situation far away, and the other side's voice was all covered by ambient sound.
[summary of the invention]
The purpose of this utility model is exactly in order to overcome deficiency of the prior art, provides that a kind of structure is terse, effect is better, is applicable to the multi-functional sound source processing device of earmuff.
For achieving the above object, the utility model proposes a kind of multi-functional sound source processing device that is used for earmuff, comprise pickup unit, AD conversion unit, D/A conversion unit, single-chip microcomputer, sound volume regulation unit, amplifier, loudspeaker; Described pickup unit output connects described AD conversion unit input, and described AD conversion unit output connects described D/A conversion unit input, single-chip microcomputer respectively; Described D/A conversion unit output and the coupling of described sound volume regulation unit; Described single-chip microcomputer also is connected with described D/A conversion unit control end, controls its shutoff or gating with the output control signal; Described sound volume regulation unit output is connected with described amplifier in; Described amplifier out connects described loudspeaker.
Above-mentioned multi-functional sound source processing device also comprises FM reception unit, switch; Described switch one input is connected with described FM reception unit output, and another input of described switch connects described D/A conversion unit output; The output of described switch is connected with described sound volume regulation unit input; Described switch is used for the input signal of described D/A conversion unit of gating or FM reception unit.
Above-mentioned multi-functional sound source processing device, described pickup unit are Electret Condencer Microphone.
Above-mentioned multi-functional sound source processing device, described single-chip microcomputer is connected with the shutoff pin of described D/A conversion unit, controls its shutoff or gating with the output control signal.
Because adopted above scheme, the audio signal size is read with digital signaling by single-chip microcomputer, anti-jamming capacity is better than the device that adopts analog signal; The audio signal that microphone received need not be directly connected to AD conversion unit through amplifier, reaches the effect of economization assembly; When ambient sound was higher than set point, the utility model was directly by the shutoff pin of Single-chip Controlling D/A conversion unit, need not external field effect transistor or triode audio signal output is controlled, also reach the effect of economization assembly.
The utility model is set up a FM reception unit, when the user is set at the wireless frequency modulation receive mode through switch, even the wearer in high noise environments such as construction site or shooting range etc., still can receive the instruction in a distant place.
[description of drawings]
Fig. 1 is a circuit structure block diagram of the present utility model.
[embodiment]
Also in conjunction with the accompanying drawings the utility model is described in further detail below by specific embodiment.
Please refer to shown in Figure 1ly, Fig. 1 is the circuit diagram of the utility model, comprising: pickup unit 1, AD conversion unit 2, D/A conversion unit 3, single-chip microcomputer 4, FM reception unit 5, selector switch 6, sound volume regulation unit 7, amplifier 8 and loudspeaker 9.
Wherein, pickup unit 1 can be Electret Condencer Microphone, in order to receiving external sound, and converts sound wave to analog electrical signal, is delivered to AD conversion unit 2 places; Convert this analog electrical signal to digital electric signal by AD conversion unit, pass to D/A conversion unit 3 and single-chip microcomputer 4 places again; The effect of D/A conversion unit 3 is to receive from the digital electric signal of AD conversion unit 2 and convert the analog electrical signal audio signal to, is delivered to switch 6 places again.When D/A conversion unit 3 during at off state not, its output is that analog electrical signal is an audio signal, and when D/A conversion unit 3 during at off state, its output is turned off, and delivery outlet is a high impedance status.The effect of single-chip microcomputer 4 is the digital electric signals that read AD conversion unit 2; whether the monitoring reading is higher than the pairing numeral of 80dB; the shutoff output of control D/A conversion unit 3; when reading is higher than the pairing numeral of 80dB; when D/A conversion unit 3 is set at off state; promptly be output as 0V, thereby make loudspeaker stop output, the protection user sense of hearing escapes injury.The effect of FM reception unit 5 is to collect the audio signal of launching through frequency modulation in the mode of FM reception, and demodulation and export switch 6 to, the effect of switch 6 is to select one of them output of D/A conversion unit 3 or FM reception unit 5, is connected to sound volume regulation unit 7; When switch 6 connects D/A conversion unit 3; this device becomes active formula hearing conservation device; when switch 6 connects FM reception unit 5; this device becomes radio FM earphone; make the wearer can accept extraneous phonetic order; even in places such as high noise environments such as construction site or shooting rangies, or transmission instruction person is in a distant place.Sound volume regulation unit 7 is an adjustable resistor, connect switch 6, and the audio signal size that transmits by switch 6 of control, control the size of output volume and be delivered to amplifier 8 with this, amplifier 8 amplifies the audio signal that is transmitted by sound volume regulation unit 7 and exports loudspeaker unit 9 to, and the audio signal that loudspeaker unit 9 is exported amplifier converts the sound wave that can hear to.
Claims (4)
1, a kind of multi-functional sound source processing device that is used for earmuff is characterized in that: comprise pickup unit (1), AD conversion unit (2), D/A conversion unit (3), single-chip microcomputer (4), sound volume regulation unit (7), amplifier (8), loudspeaker (9); Described pickup unit (1) output connects described AD conversion unit (2) input, and described AD conversion unit (2) output connects described D/A conversion unit (3) input, single-chip microcomputer (4) respectively; Described D/A conversion unit (3) output and described sound volume regulation unit (7) coupling; Described single-chip microcomputer (4) also is connected with described D/A conversion unit (3) control end, controls its shutoff or gating with the output control signal; Described sound volume regulation unit (7) output is connected with described amplifier (8) input; Described amplifier (8) output connects described loudspeaker (9).
2, multi-functional sound source processing device as claimed in claim 1 is characterized in that: also comprise FM reception unit (5), switch (6); Described switch (6) one inputs are connected with described FM reception unit (5) output, and another input of described switch (6) connects described D/A conversion unit (3) output; The output of described switch (6) is connected with described sound volume regulation unit (7) input; Described switch (6) is used for the input signal of the described D/A conversion unit of gating (3) or FM reception unit (5).
3, multi-functional sound source processing device as claimed in claim 1 or 2 is characterized in that: described pickup unit is an Electret Condencer Microphone.
4, multi-functional sound source processing device as claimed in claim 1 or 2 is characterized in that: described single-chip microcomputer (4) is connected with the shutoff pin of described D/A conversion unit (3), controls its shutoff or gating with the output control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620137060 CN200997680Y (en) | 2006-09-07 | 2006-09-07 | Multifunctional sound source processor for ear muffs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620137060 CN200997680Y (en) | 2006-09-07 | 2006-09-07 | Multifunctional sound source processor for ear muffs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200997680Y true CN200997680Y (en) | 2007-12-26 |
Family
ID=38996114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620137060 Expired - Fee Related CN200997680Y (en) | 2006-09-07 | 2006-09-07 | Multifunctional sound source processor for ear muffs |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200997680Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104105030A (en) * | 2013-04-15 | 2014-10-15 | 鸿富锦精密电子(天津)有限公司 | Electronic device |
| CN109495805A (en) * | 2018-12-07 | 2019-03-19 | 广州由我科技股份有限公司 | A kind of bluetooth headset and its control method |
-
2006
- 2006-09-07 CN CN 200620137060 patent/CN200997680Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104105030A (en) * | 2013-04-15 | 2014-10-15 | 鸿富锦精密电子(天津)有限公司 | Electronic device |
| CN109495805A (en) * | 2018-12-07 | 2019-03-19 | 广州由我科技股份有限公司 | A kind of bluetooth headset and its control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071226 |