CN2070515U - High-fidelity listen-distance adjustable device - Google Patents
High-fidelity listen-distance adjustable device Download PDFInfo
- Publication number
- CN2070515U CN2070515U CN 90207302 CN90207302U CN2070515U CN 2070515 U CN2070515 U CN 2070515U CN 90207302 CN90207302 CN 90207302 CN 90207302 U CN90207302 U CN 90207302U CN 2070515 U CN2070515 U CN 2070515U
- Authority
- CN
- China
- Prior art keywords
- resistance
- resonator
- adjustable device
- power amplifier
- compensation unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Amplifiers (AREA)
Abstract
The utility model relates to a high-fidelity listen-distance adjustable device which is particularly for the improvement of the playing of radios and voice recorders. The high-fidelity listen-distance adjustable device uses a resonator to increase the loudness of high and low volumes, and the high and low frequency components of audio signals are lifted to highest value to enhance tone quality. The reference input terminal of a power amplifier is connected with an acoustic image expanding element to make listen-distance adjustable and changeable, which creates on-site atmosphere.
Description
The utility model relates to the improvement of stereo set player, specifically, be the high and low sound of a kind of whole tone range promote with far away, in, the adjustable playback of nearly hearing distance improves device.
The music that appreciation is broadcasted by broadcast receiver or recorder, some people likes high and low sound abundant, and some people of electricity wishes to have the variation of hearing distance, to strengthen the on-the-spot sense of reality and to make melody melodious melodious.Yet, in, low-grade radio-cassette player, when small volume was broadcasted, high and low sound was difficult to be felt by people's ear.For this reason, ＂ radiotechnics ＂ in 1984 the 7th phases and 1985 the 1st phases published respectively a ＂ practicality etc. loudness compensation device ＂ and two pieces of articles of ＂ resonant mode loudness compensation device ＂.High and low sound when disclosing the small volume broadcast of adopting LC type resonator to solve broadcast receiver, recorder promotes solution, and its advantage is simple in structure, easy to implement, and is comparatively practical.Weak point is that high and low sound promotes bigger difference along with volume is regulated; And must select loudness compensation devices such as different for use according to the resistance size of volume potentiometer, versatility is poor.Volume is also bigger in addition, and certainly, above-mentioned article does not relate to the scalable problem of hearing distance.
The purpose of this utility model provides a kind of high and low sound lifting and the adjustable playback of hearing distance improves device, and especially for broadcast receiver and recorder playback, the high and low lifting ratio of whole tone range is consistent substantially, and good versatility is arranged.
Technical solution of the present utility model is as follows:
1. existing LC type resonator and volume potentiometer adopt and become the resistance circuit connection, and promptly volume is when maximum position, and resonator is by the volume potentiometer short circuit; Volume places minimum position, and when being zero, volume potentiometer total head resistance is in parallel with resonator; When other volume position, volume potentiometer constitutes the mixing connection that a part part in parallel is connected with the resonance potential device.Thereby, when the volume full adjustment.The lifting ratio of high and low sound has significant change.And, relevant with the volume potentiometer resistance that is connect, do not have a versatility.Therefore, measure of the present utility model is: a. takes the resistance suitable with resonator, with resonator with fixing connect in parallel, to reach maximum lift, the lifting curve when satisfying K ≈ 0.05 to high and low sound.
2. according to the auditory physiology phenomenon,, when distance is near, give great volume to same frequency spectrum sound source, bandwidth, particularly the low frequency composition is many, and distance is far away more, and volume is more little, and frequency band is narrow more, and the low frequency composition is few more.Therefore, the hearing distance adjusting of this programme is the acoustic image expanding element of input reference edge adding to binary channels power amplifier level, make the gain of power amplifier level and frequency band low frequency end respectively classification reduce and compression, reach cause closely, middle distance and remote different senses of hearing.
From the above mentioned, key of the present utility model is to have on the resonator a suitable parallel resistance, be connected to an acoustic image expanding element with the input reference edge of binary channels power amplifier level, be that the utility model comprises shell, by resonator and resonator fixedly the tone compensation unit that constitutes of parallel resistance and the binary channels power amplifier that the acoustic image expanding element is arranged, power supply can be taken from the broadcast receiver of connection with it or the power supply on the recorder, one end of resonator and detector stage or before put the level connect with circuit, the other end connects mutually with the centre cap of volume potentiometer, the acoustic image expanding element is connected on binary channels power amplifier level input reference edge, and the output of binary channels power amplifier level connects with circuit mutually with loudspeaker.
The utility model has the advantages that: 1. simple in structure, cost is low, tonequality is good, and the sense of hearing audio-visual effects is obvious; 2. versatility is good; 3. the utility model will reduce the exchange cost, and improvement effect is obvious as the component units of broadcast receiver or recorder.
Provide enforcement figure of the present utility model below.
Fig. 1 is a shell mechanism schematic diagram of the present utility model.
Fig. 2 is a circuit structure schematic diagram of the present utility model.
Fig. 3 is an another kind of resonator electrical schematic diagram of the present utility model.
Provide an embodiment of the present utility model according to Fig. 1 and Fig. 2, it is used for the playback output stage with stereo radio-tape recorder.We elaborate its structure, and ins and outs of the present utility model further are provided.From Fig. 1,2 as seen, the utility model comprises housing 1, tone compensation unit 2, binary channels power amplifier 3.In Fig. 2, tone compensation unit 2 comprises resonator that is made of L, C and the resonator parallel resistance R that is in parallel with it
1, having two tone compensation unit 2, their end links with the output port A and the B of Fig. 1 housing 1 respectively.The other end respectively with binary channels power amplifier 3 on volume potentiometer W
1And W
2Centre cap join, power amplifier 3 comprises binary channels power amplifier integrate circuit IC
1, corresponding external capacitor C
2～C
8, volume potentiometer W
1, W
2Be connected on IC
1The acoustic image expanding element 4 of two input reference edges.Wherein, C
2And C
3Be the input coupling capacitance, cross-over connection is in volume potentiometer W respectively
1, W
2Centre cap and IC
1Two inputs.Acoustic image expanding element 4 is by capacitor C
9, C
10, resistance R
2, R
3And K switch
1Constitute capacitor C
9And C
10Respectively with IC
1Two the input reference edges link their common port and resistance R
2Be connected in a M, resistance R
3One end and resistance R
2Be serially connected with a N, other end ground connection, K switch
1Cutter ground connection, it is thrown respectively and connects mutually with a M, N and P, the some P unsettled.Like this, K switch
1When placing position M, capacitor C
9, C
10Ground connection, at this moment, the frequency band of power amplifier 3 is the wideest, and gain is maximum, sounds that sound source resembles closely to locate K
1When placing the N position, capacitor C
9, C
10Through resistance R
2Connect mutually with ground, because resistance R
2Existence and C
9, C
10Crosslinked coupling, acoustic image is expanded, the frequency band of power amplifier 3 is compressed, particularly low frequency end is compressed, gain reduces relatively, it broadcasts effect to sound makes the people feel that sound source image at the middle distance place, works as K
1When placing the P position, capacitor C
9, C
10Through series resistance R=R
2+ R
3Go into ground, acoustic image is further expanded, the frequency band low frequency end of power amplifier 3 further by compression, gain further reduces, and makes broadcast effect low frequency composition still less, volume is littler, sounds just as sound source at distant location.In the present embodiment, IC
1Take two-path amplifier integrated circuit TA7240P, input capacitance C
2=C
3=1 μ F, output coupling capacitor C
6=C
7=1000 μ F promote capacitor C
5=C
8=100 μ F. and volume potentiometer W
1, W
2Corresponding adjusting knob S
1, S
2With with K switch
1Corresponding knob S
3Place respectively on the panel of housing 1, the output port E of power amplifier 3 and F respectively with housing 1 on output Out1 and Out2 connect mutually, also have power port V and grounding ports.
As the replacement of the foregoing description, tone compensation unit 2 is reactance tubular type resonator and parallel resistance R shown in Figure 3
1Constitute.By transistor BG
1, collector resistance R
5, the collection basic feedback resistance R
4, emitter resistance R
6, base capacity C
12With the resonance capacitor C
13, C
14The resonator that constitutes has the little advantage of volume, wherein BG
1, R
4～R
6And C
12Together, play the L of existing LC type resonator
1Function.
Claims (4)
1. the adjustable device of high tone quality hearing distance is used in particular for the improvement of broadcast receiver, recorder playback, comprises housing 1, tone compensation unit 2 and power amplifier 3, it is characterized in that:
A. tone compensation unit 2 is reached the parallel resistance R that matches with resonator resonance curve K ≈ 0.05 by resonator
1Become fixed connection;
B. the input reference edge of power amplifier 3 is connected to acoustic image expanding element 4, volume potentiometer W
1, W
2Centre cap connect with the 2 one-tenth circuit in corresponding tone compensation unit respectively.
2. according to the described adjustable device of claim 1, it is characterized in that acoustic image expanding element 4 is by electric C
9, C
10, resistance R
2, R
3And K switch
1Constitute capacitor C
9And C
10Respectively have an end and power amplifier 3 corresponding input reference edges to connect, the other end links each other and is connected to a M, resistance R
2One tip node M, the other end and resistance R
3Be serially connected with a N, R
3Other end ground connection, K switch
1Throw respectively and be connected with P with a M, N, cutter ground connection, P is unsettled for point.
3. according to the described adjustable device of claim 1, it is characterized in that the resonator in the tone compensation unit 2 is LC type resonator or reactance type resonator.
4. according to the described adjustable device of claim 3, it is characterized in that reactance type resonator is by transistor BC
1, collector resistance R
5Collect basic feedback resistance R
4, emitter resistance R
6, base capacity C
12With the resonance capacitor C
13, C
14Constitute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90207302 CN2070515U (en) | 1990-06-05 | 1990-06-05 | High-fidelity listen-distance adjustable device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90207302 CN2070515U (en) | 1990-06-05 | 1990-06-05 | High-fidelity listen-distance adjustable device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2070515U true CN2070515U (en) | 1991-01-30 |
Family
ID=4887746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90207302 Expired - Lifetime CN2070515U (en) | 1990-06-05 | 1990-06-05 | High-fidelity listen-distance adjustable device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2070515U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101533666B (en) * | 2008-03-14 | 2013-04-03 | 爱国者电子科技有限公司 | Method for setting recording distance of electronic recording equipment |
| CN101489165B (en) * | 2008-01-16 | 2013-05-08 | 鸿富锦精密工业（深圳）有限公司 | Audio frequency compensation apparatus |
-
1990
- 1990-06-05 CN CN 90207302 patent/CN2070515U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101489165B (en) * | 2008-01-16 | 2013-05-08 | 鸿富锦精密工业（深圳）有限公司 | Audio frequency compensation apparatus |
| CN101533666B (en) * | 2008-03-14 | 2013-04-03 | 爱国者电子科技有限公司 | Method for setting recording distance of electronic recording equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4194165A (en) | Miniature guitar amplifier | |
| CN202957973U (en) | High-performance amplitude-modulation wireless microphone | |
| CN2070515U (en) | High-fidelity listen-distance adjustable device | |
| US20050249484A1 (en) | Wireless digital music playing and transmitting device for portable DVD/CD player | |
| CN207625775U (en) | A kind of phonograph radio reception circuit and phonograph | |
| CN207587379U (en) | A kind of multifunctional combination phonograph and its device | |
| CN202035120U (en) | Wireless karaoke video accompanying microphone | |
| CN2682751Y (en) | Remote controller with pickup function and television set with radio reception function | |
| CN201957199U (en) | Device reusing metal wires with mechanical property in sound box as receiving antenna | |
| CN1048297A (en) | The audio frequency amplifier of scalable hearing distance | |
| CN2167485Y (en) | Infrared monolithic wireless ear phone | |
| CN2165576Y (en) | Wireless frequency modulating transmitter-receiver | |
| CN2243143Y (en) | Integrated infrared frequency-modulation earphone | |
| CN2554871Y (en) | Audio power amplifier of variable output impendance | |
| Holmes et al. | A developmental pocket-size broadcast receiver employing transistors | |
| CN2574319Y (en) | Improved sound radio transmitting and receiving device for TV set | |
| CN107886976A (en) | A kind of multifunctional combination phonograph and its device | |
| CN214544789U (en) | Power amplifier all-in-one machine with network audio-video playing function | |
| CN2217282Y (en) | Sound signal radio transmission arrangement | |
| CN2177306Y (en) | FM receiving and electromagnetic induction dual wireless earphone | |
| CN209105191U (en) | A kind of fixed frequency reception system of amplitude modulation | |
| CN2930178Y (en) | Infrared remote control radio speaker | |
| CN2084265U (en) | Frequency modulation stereophonic demodulator | |
| US5596649A (en) | Sound concentrator for selectively collecting sound and concentrating and transmitting the collected sound | |
| CN2127215Y (en) | Infrared tv sound reciver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |