CN2540335Y - Integral microphone and earphone for preventing having whistler and echo - Google Patents
Integral microphone and earphone for preventing having whistler and echo Download PDFInfo
- Publication number
- CN2540335Y CN2540335Y CN02227799U CN02227799U CN2540335Y CN 2540335 Y CN2540335 Y CN 2540335Y CN 02227799 U CN02227799 U CN 02227799U CN 02227799 U CN02227799 U CN 02227799U CN 2540335 Y CN2540335 Y CN 2540335Y
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- CN
- China
- Prior art keywords
- power amplifier
- frequency
- microphone
- echo
- capacitor
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Abstract
An integrated sending/receiving device which can avoid sharp voice and echo comprises a receiver composed of a power amplifier and a horn, and a sender composed of a power amplifier II and a microphone for sending voice. The utility model is characterized in that the power amplifier of the receiver and the horn are arranged with a low-pass filter between, the microphone and the power amplifier II of the receiver are arranged with a high-pass filter between. The utility model arranges the horn and microphone with the voice structures in different frequencies (low frequency and high frequency), to effectively divide voice into two portions, to eliminate high-frequency portion of output voice of the horn while the low-frequency portion is filtered out via the high-pass filter of the microphone, to avoid entering into the amplifier portion of the microphone, to avoid high-frequency echo at the microphone, to avoid sharp voice and echo. And the utility model can confirm reliable duplex communication, with simple structure and easy application.
Description
Technical field
The utility model belongs to the broadcast communication technical field, particularly relates to a kind of integrated receiving/transmitting device of uttering long and high-pitched sounds with echo that prevents to produce.
Background technology
The Karaoke of existing integrated receiving/transmitting device such as sound equipment, the hand-free receiver of telephone set, the Handless of vehicular telephone or the Handless on the automobile all are the scenes that loudspeaker that send words and the microphone of being talked about are carried out duplex signaling simultaneously, and the sound of loudspeaker output is imported via microphone again and returning of producing uttered long and high-pitched sounds is a kind of representative type physical phenomenon, so this incorporate sending, receiver unit in use tends to occur because of the loudspeaker output sound is too big or microphone causes echo and the phenomenon of uttering long and high-pitched sounds near loudspeaker, make people can't carry out normal communication or hold and can't stand this noise jamming, for addressing the above problem, existing technology generally is to adopt the mode of single worker's communication, wireless microphone employing as taxicar adds the manual switching switch or adopts the automatic single merit of electronic type to switch, but free and relaxed when this mode can not guarantee to use, can only be that a side is when speaking, the opposing party must shut up, and can't realize talking animatedly freely as both sides such as the phone.
Summary of the invention
The purpose of this utility model provide a kind of simple in structure, realize easily, can effectively prevent to produce the integrated receiving/transmitting device of uttering long and high-pitched sounds with the duplex signaling of echo.
The technical solution of the utility model is achieved in that
A kind ofly prevent to produce the integrated receiving/transmitting device of uttering long and high-pitched sounds with echo, what comprise the transmission one's own side sound of being talked about assembly and being made up of power amplifier II and microphone be made up of power amplifier and loudspeaker send the words assembly, its characteristics are to be talked about between the power amplifier of assembly and the loudspeaker and are provided with low-pass filter, are used for the HFS through the sound signal of the other side's sound behind the power amplifier being filtered and it being delivered to loudspeaker; Send between words microphone of assembly and the power amplifier II and be provided with high-pass filter, be used for the low-frequency audio signal that microphone receives is filtered, and it delivered to power amplifier amplify.
Wherein generation for further preventing to utter long and high-pitched sounds with echo, making the sound signal that arrives loudspeaker all is low-frequency audio signal, the above-mentioned assembly of being talked about also includes frequency demultiplier, and the sound signal that is used for the other side's sound that will receive drops to the bass zone and the sound signal after the frequency reducing delivered to power amplifier carry out audio frequency and amplify.
For making existing high-frequency audio signal in the sound signal that is sent to the other side, low-frequency audio signal is arranged again, the above-mentioned words assembly that send also includes low-frequency compensator, be used for producing low frequency signal and with deliver to behind itself and the frequent signal plus of high frequency audio after power amplifier II amplifies talked about assembly output circuit in order to the low frequency signal of compensation by one's own side's sound that high-pass filter filtered.
The utility model is owing to adopt the structure of the sound signal of different frequency (low frequency and high frequency) by loudspeaker and microphone, effectively sound is divided into two parts, make low-frequency audio signal supply with loudspeaker output via low-pass filter, the sound that microphone is enrolled then partly enters its power amplifier via high pass filter, processes for having only high-frequency audio, thereby the sound that guarantees loudspeaker output does not have the high pass filtering by microphone of HFS and its low frequency part, can not enter into the power amplifier part of microphone, making microphone not have high-frequency sound returns and is subjected to, thereby can not produce and utter long and high-pitched sounds and echo, this structure has also guaranteed can carry out duplex signaling reliably in communication process simultaneously, solved the problem in single merit switching communication process, people can be talked animatedly freely, and the utility model is simple in structure, realize easily.
Description of drawings
Describe basic composition of the present utility model and principle of work in detail below in conjunction with accompanying drawing:
Fig. 1 is that circuit of the present utility model is formed block scheme;
Fig. 2 is schematic circuit diagram of the present utility model.
The specific embodiment
As shown in Figure 1, what the utility model comprised the transmission one's own side sound of being talked about assembly and being made up of power amplifier II and microphone be made up of power amplifier and loudspeaker send the words assembly, its characteristics are to be talked about between the power amplifier of assembly and the loudspeaker and are provided with low-pass filter, are used for the HFS through the sound signal of the other side's sound behind the power amplifier being filtered and it being delivered to loudspeaker; As shown in Figure 2, low-pass filter described in the present embodiment is by inductance L
1, capacitor C
9And capacitor C
10Form, wherein inductance L
1Be serially connected between power amplifier mouth and the loudspeaker capacitor C
9And capacitor C
10An end respectively with the sense L
1Two ends connect, its other end is ground connection respectively.Send between words microphone of assembly and the power amplifier and be provided with high-pass filter, be used for the low frequency signal that microphone receives being filtered and it being delivered to power amplifier II amplify.As shown in Figure 2, high-pass filter described in the present embodiment is by capacitor C
18, inductance L
2And resistance R
11Or inductance L composition, wherein capacitor C
18Be serially connected between microphone and the power amplifier II input end inductance L
2With resistance R
11Or an end of inductance L respectively with capacitor C
18Two ends connect, its other end is ground connection respectively.Wherein generation for further preventing to utter long and high-pitched sounds with echo, making the sound signal that arrives loudspeaker all is low-frequency audio signal, the above-mentioned assembly of being talked about also includes frequency demultiplier, and the sound signal that is used for the other side's sound that will receive drops to the bass zone and the sound signal after the frequency reducing delivered to power amplifier carry out audio frequency and amplify.For making existing high-frequency audio signal in the sound signal that is sent to the other side, low-frequency audio signal is arranged again, the above-mentioned words assembly that send also includes low-frequency compensator, be used for producing low frequency signal and with deliver to after itself and the high-frequency audio signal addition after power amplifier II amplifies talked about assembly output circuit in order to the low frequency signal of compensation by one's own side's sound that high-pass filter filtered.Power amplifier described in the utility model and power amplifier II, frequency demultiplier, low-frequency compensator all can be made up of existing ripe circuit simultaneously, and the present embodiment intermediate power amplifier is by ic chip
2, capacitor C
6, C
7, C
8Form, wherein ic chip
2Adopt computing comparator 2822, capacitor C
6Be serially connected in frequency demultiplier mouth and IC
2Negative input, capacitor C
7Be serially connected in IC
2Electrode input end and ground between, capacitor C
8Be serially connected in IC
2Mouth and low pass filtered degree device between.Frequency demultiplier is by ic chip
1, resistance R
1, R
2, R
3, R
4, R
5, R
6, capacitor C
1, C
2, C
3, C
4, C
5Form, wherein ic chip
1Adopt computing comparator 4558, capacitor C
1, resistance R
1, R
2Be connected in series in regular turn and capacitor C
1The sound signal end of termination the other side sound, resistance R
2Another termination IC
1Electrode input end, capacitor C
2An end and resistance R
1, R
2Interface point connect its another termination IC
1Mouth, form anodal backfeed loop, capacitor C
3, resistance R
4Be serially connected in IC after the parallel connection
1Negative input and mouth between form the negative pole backfeed loop, resistance R 3 is serially connected in IC
1Negative input and ground between, capacitor C
4Be serially connected in IC
1Electrode input end and ground between, capacitor C
5Be serially connected in IC
1The cathode power supply end and ground between, resistance R
5, R
6Be connected on IC after the series connection
1Mouth and ground between, and resistance R
6Be divider resistance, its tapping connects the input end of power amplifier.Power amplifier II is by ic chip
4, capacitor C
15, C
16, C
17, C
19, resistance R
10Form, wherein ic chip
4Adopt computing comparator 4558, capacitor C
17Be serially connected in high-pass filter and IC
4Electrode input end between, resistance R
10Be serially connected in IC
4Electrode input end and ground between, capacitor C
16Be serially connected in IC
4Negative input and ground between, capacitor C
15Be serially connected in ic chip
4Mouth and low-frequency compensator between, capacitor C
19Be serially connected in IC
4The cathode power supply end and ground between.Low-frequency compensator is by ic chip
3, resistance R
7, R
8, R
9, capacitor C
12, C
13, C
14Form, wherein ic chip
3Adopt computing comparator 4558, electric cloudy R
9With capacitor C
14Be serially connected in ic chip
3Negative input and ground between, ic chip
3Electrode input end be connected resistance R with the mouth of power amplifier II
8, capacitor C
13Back one end in parallel and ic chip
3Mouth connect its other end and resistance R
8, capacitor C
14Interface point be connected to form negative pole backfeed loop, capacitor C
12An end and IC
3Mouth connect, its other end is as the audio signal output end and the resistance R of one's own side's sound
7Be serially connected between this mouth and the ground.
Claims (7)
1, a kind ofly prevents to produce the integrated receiving/transmitting device of uttering long and high-pitched sounds with echo, what comprise the transmission one's own side sound of being talked about assembly and being made up of power amplifier II and microphone be made up of power amplifier and loudspeaker send the words assembly, it is characterized in that being talked about between the power amplifier of assembly and the loudspeaker and be provided with low-pass filter, be used for the HFS through the sound signal of the other side's sound behind the power amplifier being filtered and it being delivered to loudspeaker; Send between words microphone of assembly and the power amplifier II and be provided with high-pass filter, be used for the low frequency signal that microphone receives being filtered and it being delivered to power amplifier II amplify.
2, according to claim 1ly prevent to produce the integrated receiving/transmitting device of uttering long and high-pitched sounds, it is characterized in that above-mentioned low-pass filter is by inductance L with echo
1, capacitor C
9And capacitor C
10Form, wherein inductance L
1Be serially connected between power amplifier mouth and the loudspeaker capacitor C
9And capacitor C
10An end respectively with the sense L
1Two ends connect, its other end is ground connection respectively.
3, according to claim 1 and 2ly prevent to produce the integrated receiving/transmitting device of uttering long and high-pitched sounds with echo, it is characterized in that the above-mentioned assembly of being talked about also includes frequency demultiplier, the sound signal that is used for the other side's sound that will receive drops to the bass zone and the sound signal after the frequency reducing is delivered to power amplifier carry out audio frequency and amplify.
4, according to claim 1ly prevent to produce the integrated receiving/transmitting device of uttering long and high-pitched sounds, it is characterized in that above-mentioned high-pass filter is by capacitor C with echo
18Inductance L
2And resistance R
11Or inductance L composition, wherein capacitor C
18Be serially connected between microphone and the power amplifier II input end inductance L
2With resistance R
11Or an end of inductance L respectively with capacitor C
18Two ends connect, its other end is ground connection respectively.
5, describedly prevent to produce the integrated receiving/transmitting device of uttering long and high-pitched sounds according to claim 1 or 4 with echo, it is characterized in that the above-mentioned words assembly that send also includes low-frequency compensator, be used for producing low frequency signal and be used for compensating the low-frequency audio signal that one's own side's sound filters out in high pass delivering to the output circuit of being talked about assembly after itself and the high-frequency audio signal addition after power amplifier II amplifies.
6, according to claim 1 and 2ly prevent to produce the integrated receiving/transmitting device of uttering long and high-pitched sounds, it is characterized in that above-mentioned loudspeaker adopt the low-frequency resonance loudspeaker with echo.
7, according to claim 1 and 2ly prevent to produce the integrated receiving/transmitting device of uttering long and high-pitched sounds, it is characterized in that above-mentioned microphone adopts the microphone of the high induction reactance of capacitive character with echo.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02227799U CN2540335Y (en) | 2002-05-27 | 2002-05-27 | Integral microphone and earphone for preventing having whistler and echo |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02227799U CN2540335Y (en) | 2002-05-27 | 2002-05-27 | Integral microphone and earphone for preventing having whistler and echo |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2540335Y true CN2540335Y (en) | 2003-03-19 |
Family
ID=33704509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02227799U Expired - Fee Related CN2540335Y (en) | 2002-05-27 | 2002-05-27 | Integral microphone and earphone for preventing having whistler and echo |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2540335Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104023296A (en) * | 2014-06-19 | 2014-09-03 | 深圳市中兴移动通信有限公司 | Sound output method and device and mobile terminal |
| CN108848434A (en) * | 2018-05-24 | 2018-11-20 | 深圳普罗声声学科技有限公司 | Sound processing method and device, the hearing aid of apparatus for processing audio |
| CN109147811A (en) * | 2018-08-03 | 2019-01-04 | 无锡壹人灯科技发展有限公司 | A kind of audio system for realizing reverberation elimination and chauvent's criterion using single wheat |
| CN109983782A (en) * | 2016-09-30 | 2019-07-05 | 雅马哈株式会社 | Session auxiliary device and session householder method |
-
2002
- 2002-05-27 CN CN02227799U patent/CN2540335Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104023296A (en) * | 2014-06-19 | 2014-09-03 | 深圳市中兴移动通信有限公司 | Sound output method and device and mobile terminal |
| CN109983782A (en) * | 2016-09-30 | 2019-07-05 | 雅马哈株式会社 | Session auxiliary device and session householder method |
| CN108848434A (en) * | 2018-05-24 | 2018-11-20 | 深圳普罗声声学科技有限公司 | Sound processing method and device, the hearing aid of apparatus for processing audio |
| CN109147811A (en) * | 2018-08-03 | 2019-01-04 | 无锡壹人灯科技发展有限公司 | A kind of audio system for realizing reverberation elimination and chauvent's criterion using single wheat |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |