CN2701203Y - Environment noise inhibitory type multifunctional earphone - Google Patents

Environment noise inhibitory type multifunctional earphone Download PDF

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Publication number
CN2701203Y
CN2701203Y CN 200420032967 CN200420032967U CN2701203Y CN 2701203 Y CN2701203 Y CN 2701203Y CN 200420032967 CN200420032967 CN 200420032967 CN 200420032967 U CN200420032967 U CN 200420032967U CN 2701203 Y CN2701203 Y CN 2701203Y
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China
Prior art keywords
earphone
microphone
signal processing
circuit
environmental noise
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Expired - Fee Related
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CN 200420032967
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Chinese (zh)
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方军
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Individual
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Individual
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Abstract

The utility model provides an environment noise inhibitory type multifunctional earphone, comprising an earphone seat containing an earphone core, a microphone seat containing an inner microphone, a microphone head connected with the back cover of the earphone, and a signal processing circuit. The utility model is characterized in that between the earphone seat and the microphone seat, an isolating cavity provided with voice via holes is connected. The microphone head is provided with two microphones whose central axis lines are staggered with each other and of the same model. The signal processing circuit is provided with a speech signal and singing voice dissipative processing circuit and an earphone noise proof signal processing and mixing amplifying circuit. The utility model has the basic the functions of the existing earphone, and can operate in the strong noise environment, accomplishing a plurality of functions of the noise isolation, language communication, and reading aloud for memorizing in the strong noise environment.

Description

The multi-functional headset of environmental noise inhibition type
Technical field:
The utility model is relevant with headset, and is special relevant with the multi-functional headset of environmental noise inhibition type.
Background technology:
Existing headset is a kind of passive termination device, generally wears stereophone by the common electrical dynamic formula and an Electret condenser microphone constitutes by simple combination.The signal of earphone and microphone is independently of one another, so it can only be as the annex of other device and does not have standalone feature.Aspect the inhibition of environmental noise, the major measure that existing headset is taked in earphone portion is: make the sandwich construction earphone covers with the good material of defening effect and stop the noise invasion.This structure anti-noise effect is relatively poor, and ear is felt under the weather when wearing.
The utility model content:
The purpose of this utility model is in order to overcome above deficiency, a kind of basic function that not only has existing headset is provided, and can also in strong noisy environment, work, finish noise isolation, communication strong noisy environment under, chant the multi-functional headset of environmental noise inhibition type of multiple independent energy such as mnemonic(al).
The purpose of this utility model is achieved like this:
The multi-functional headset of the utility model comprises that the earphone base that contains the earphone core contains the microphone stand of inner microphone, the microphone head that is connected with the earphone bonnet, signal processing circuit, it is characterized in that between earphone base and microphone stand, being connected with the separate cavities that contains the sound via hole, the microphone that the model that has two axis to stagger mutually on the microphone head is identical, voice signal is arranged and the song treatment circuit that disappears in the signal processing circuit, earphone anti-noise signal processing and mixing amplifying circuit, adopt separate cavities, earphone and microphone are divided into two individual cavity, this can make earphone and interior microphone near improving earphone anti-noise effect on the one hand, stoped the generation of self-excitation phenomena on the other hand again effectively, two the identical microphones of model that adopt the axis to stagger mutually, two different sensings have just appearred in the microphone head, use A here 1, A 2Represent two microphones respectively, A 2Output signal after paraphase with A 1The signal of output mixes back output (promptly poor two signals), because voice signal itself has than highly directive, send words person again always facing to A 1, A 2In wherein speech, an A like this 1, A 2On the signal difference of picking up very big, do can not be cancelled after the difference, and for noise signal, because of its sound source complexity, directivity is poor, makes A 1, A 2The signal that picks up is done only to deposit faint background noise after the difference much at one, has so just realized the effect that stops noise and speech together to be picked up by microphone.
Above-mentioned microphone stand is subjected to face to be shaped as spill, in the cavity that spill is formed by the face and the separate cavities back side at least one slit is arranged, the cavity that utilizes the concave surface and the separate cavities back side to form simulates the cavity of earphone and auricle formation, the signal that microphone is picked up is more approaching with the remanent noise signal that enters ear, improve the anti-noise effect, simultaneously, this spill is subjected to face can improve the sensitivity of microphone.
Above-mentioned slit is three, is evenly distributed on microphone stand and is subjected in the cavity of face and the formation of the separate cavities back side.
The axis of two microphones on the above-mentioned microphone head is orthogonal, the vertical mode of laying in two microphone axis makes its sensing also be the both direction of quadrature, cooperates the upper-lower position adjusting of microphone bar just to lay a good foundation for the realization of " talking in the strong noise " this specific function again.
The signal that receives the output of microphone head is arranged in the above-mentioned voice signal and the song treatment circuit that disappears and regulate the duplex potentiometer W of volume 1, respectively by input 2., 5. pin be connected with duplex potentiometer contain ic chip 1aInverting amplifier and contain ic chip 1bIn-phase amplifier, with the R sound channel and the IC of circuit (expansion end) 1b, 5. pin connect by C 6, R 9The high pass filter that constitutes is connected to the position device VR on the left and right sound channels 1, respectively with IC 1a, IC 1bThe load resistance VR that output connects 2
Have and load resistance VR in above-mentioned voice signal and the song treatment circuit 2With socket CK 2The resistance R that connects 5, R 6, capacitor C 3The voltage divider that constitutes, VR 2The signal one route voltage divider decay back of output is by socket CK 2Send, another road is through CK 2Normally-closed contact is delivered to mixed class.
In above-mentioned earphone anti-noise signal processing and the mixing amplifying circuit ic chip is arranged 2a, IC 2bThe inverting amplifier that is connected into, the paraphase of finishing left and right acoustic channels earphone anti-noise signal respectively amplify and finish and the mixing of other signal.
The utility model is a kind of improved headset, can in strong noisy environment, work, can finish multiple functions such as " noise isolation ", " communication " under the strong noisy environment, " chanting mnemonic(al) " again, in the quiet occasion of environment, it can switch to passive mode from active mode, identical with existing headset, kept the basic function of existing headset.
Description of drawings:
Fig. 1 is the utility model structural representation.
Fig. 2 is the Headphone structure schematic diagram.
Fig. 3 is the separate cavities structural representation.
Fig. 4 is the separate cavities floor map.
Fig. 5 is that A among Fig. 4 is to view.
Fig. 6 is the microphone stand structural representation.
Fig. 7 is that B among Fig. 6 is to view.
Fig. 8 is an earphone understructure schematic diagram.
Fig. 9 is that C among Fig. 8 is to view.
Figure 10 is a microphone header structure schematic diagram.
Figure 11 is the longitudinal sectional view among Figure 10.
Figure 12 changes schematic diagram for microphone points to.
Figure 13 is the signal processing circuit block diagram.
Figure 14 is the signal processing circuit schematic diagram.
Figure 15 is the outline drawing of signal processing circuit.
Figure 16 is the signal line structure schematic diagram.
Figure 17 is another structural representation of holding wire.
Figure 18 is a holding wire structural representation again.
Embodiment:
Referring to Fig. 1, earphone 1 is connected with microphone head 2 by the microphone bar, and its signal links to each other with signal processing circuit 3 with socket by holding wire.
Referring to Fig. 2, in the earphone 1 as Fig. 6, microphone stand 4 shown in Figure 7 with as being equipped with as Fig. 3～separate cavities 6 that contains the sound via hole shown in Figure 5 between Fig. 8, the earphone base 5 shown in Figure 9.The microphone stand front end has the bonnet 7 of band microphone rod bearing and wire hole.Being subjected to face 8 shapes such as Fig. 6, Figure 7 shows that spill of microphone stand.The cavity 9 that microphone stand concave surface and the separate cavities back side form (middlely links to each other through three support chips, form the slit 9 of three road equalizations) simulate the cavity that earphone and auricle form, the signal that microphone 10 picks up in making is more approaching with the remanent noise signal that enters ear, improves the anti-noise effect.Signal processing circuit in the earphone comprises the voice signal shown in Figure 13,14 and the song treatment circuit that disappears, earphone anti-noise signal processing and mixing amplifying circuit.
As Figure 10～shown in Figure 12, the mutually perpendicular microphone 11,12 in two axis is housed on the microphone head 2.
As shown in figure 13, the voice signal and the song treatment circuit that disappears comprise subtracter A, subtracter B, speech amplifying circuit.Earphone anti-noise signal processing and mixing amplifying circuit comprise amplitude uniting and adjustment circuit, inverting amplifier, mixer amplifier.
At processor level adding mixer amplifier not, its effect is with earphone anti-noise signal, voice signal and mix from the signal of line input or expansion end (FROMRDIO), thus realize multiple function.Subtracter B is used for and will comes from after " stereophonic music signal " cancellation " original singer's song " of circuit or expansion end and the voice signal stack again, " singing exercise " function when realizing stereo source of sound input.Its song principle that disappears is: stereo left and right sound track signals is made difference because song wherein is the signal of balance, do to be eliminated after the difference; And the accompaniment music signal is unbalanced, does to be retained after the difference.High pass filter among the figure (HPF) is for the accompaniment that recovers to be cancelled and the bass composition in the song and establish.Inverting amplifier is used for exporting the effect of left and right acoustic channels earphone generation anti-noise respectively to sending into mixer amplifier after left and right acoustic channels microphone stand " MIC-R ", " MIC-L " signal paraphase amplification.Carry out signal amplitude uniting and adjustment of left and right acoustic channels anti-noise and balance before the inverting amplifier respectively.
Figure 14 is the reference electrical schematic diagram according to the signal processor of Figure 13 design.This circuit is a core by two earphone amplification circuit TDA1308T, adds that a small amount of peripheral cell realized all functions among Figure 13, and circuit is very succinct, and quiescent dissipation is less than 10mA.Complete machine can be made the external form of similar Figure 15, and by six pin plugs and headset get in touch (be located at headset socket partly for map convenient not in draw).Holding wire is used for microphone signal output among Figure 16; Holding wire is used for the line signal input among Figure 17; Holding wire is used for the switching of headset " passive " mode among Figure 18.
One, circuit theory
1, voice signal and " song disappears " treatment circuit
Microphone head MIC-A 2And MIC-A 1The signal of output is through duplex potentiometer W 1After regulating volume, deliver to by IC respectively 1aThe inverting amplifier of forming and by IC 1bThe in-phase amplifier input of forming 2., 5. pin, from " stereophonic music signal " of circuit expansion end (FROM RADIO) through W 3Regulate volume, double-pole switch K 3After, signal is through M, N contact, also respectively input 2., 5. pin, N contact and IC 15. be connected between pin,, be used to recover to accompany and the low frequency composition of song by the high pass filter (HPF) that C6, R9 constitute.VR 1Be used for " the song balance disappears " and regulate, the output signal of two-way amplifier is through common load resistance VR 2Mix, and by VR 2Export after regulating mixing ratio.This grade can be finished simultaneously voice signal and line signal are made function poor and that mix respectively.This level has 100 multiplication benefits approximately to voice signal, to only have an appointment 1 times gain of line signal.VR 2The signal one route R of output 5, R 6, C 3The voltage divider decay back that constitutes is by socket CK 2Send, another road is through CK 2Normally-closed contact is delivered to mixed class.Since microphone signal output line plug be two sound channels and connect see Figure 16, so the holding wire plug does not insert CK 2The time voltage divider do not insert.
2, earphone anti-noise signal processing and mixing amplifying circuit
IC 2a, IC 2bBe connected into two identical inverting amplifiers, the paraphase of finishing left and right acoustic channels earphone anti-noise signal is respectively amplified and is finished and the mixing of other signal.With the L channel is example, from the anti-noise signal of " MIC-L ", through W 2Amplitude of accommodation VR 3After the balance, by C 15, R 19Be coupled to IC 22. pin is exported by " EJ-L " after the paraphase amplification.The anti-noise signal can get maximum about 100 times gain at this grade.The L sound channel signal of circuit or expansion end is through W 3Regulate volume K 3-aAfter the selection, by C 14, R 18Also deliver to this pin.This level gains about 1 times to line signal.Send into IC simultaneously 22. pin also has CK 2Normally-closed contact is sent here, through IC 1" speech and the accompaniment music signal " handled, gain is by R 24Decision.Because IC 22. pin forms virtual earth, and each signal can not disturb mutually during mixing.
3, expanded circuit
When the input of no circuit, expansion end (FROMRADIO) can be imported the decoded signal of " f-m stereo acoustic receiver ", is equipped with " FM stereo transmitter " again, this headset " wireless body machine system " (having the noise resistance function equally).Can realize functions such as wireless headset, wireless microphone, wireless talkback.Because circuit mode is various, concrete principle is no longer applied here and is stated.
Debugging and use
At first, the signal processor plug is inserted headset and opens K 1, K 2Select R 1, R 2, R 16, and R 17Size make four microphone output signal the bests (the most handy special test device help adjust).Then, processor is placed the environment of certain intensity noise and puts on headset, enter following debugging and operation;
1, noise isolator
Close K 2(keep K 1Open) accent W 2Noise in the earphone is reduced, transfer VR 3The noise that diotic hearing is arrived equates.During use, only need fine tuning W 2Make diotic hearing to environmental noise synchronously reach minimum and get final product.
2, " the chanting mnemonic(al) " in the noisy environment and " talk "
Open K 1, K 2, K 3Dial at shown position, and the microphone volume is opened to maximum.Regulate VR earlier 2Make noise minimum in the earphone, again the microphone bar is raised up to " UP " position (Figure 12), top, select R 24, R 25Size, with ear can clear resolution in one meter in the dead ahead towards oneself speech degree of being.During use, lift the microphone bar and can talk, put down microphone phase bar and can hear the sound of chanting of oneself again, regulate W with the other side 1Can make volume moderate, regulate W 2Can make earphone anti-noise best results.
3, " active earphone " reaches " singing exercise "
This function has not needed to debug again.During use, " holding wire (shown in Figure 17) " left end is inserted CK 1, right-hand member connects with dual track plug and walkman, connects with sources of sound such as RCA plug and video disc player, television sets.Close K 2(keep K 1Open) K 3Dial at shown position.Regulate source of sound volume and W 3Can appreciate music from above-mentioned source of sound.As this music is " accompanying song ", and only need again with K this moment 2Open and put down the microphone bar, adjust the microphone volume, can carry out " singing exercise "; If " stereo music ", then with K 3Be allocated to the left of shown position and transfer VR 1Make " original singer's sound " minimum, adjust microphone again and the circuit volume gets final product.
4, at CK 1And CK 2In insert the left end plug of " holding wire (shown in Figure 17) " and " holding wire (shown in Figure 16) " respectively, the right-hand member plug is connected to external equipment.Open K 1, K 2, K 3Dial and open to maximum, select R at shown position and with the microphone volume 6Value make the external equipment output signal undistorted for the degree.The volume of microphone and earphone can be by W 1, W 3Regulate W respectively 2Regulate earphone anti-noise effect.(W 2Inhour is screwed into the end and can cancels earphone anti-noise function, closes K 1Keep K 2Open the desirable words function of enjoying).
5, the switching of common headset
The processor plug is taken off from headset, change and plug " holding wire (shown in Figure 180) ", can as common headset, use.

Claims (10)

1, the multi-functional headset of environmental noise inhibition type, comprise the earphone base that contains the earphone core, contain the microphone stand of inner microphone, the microphone head that is connected with the earphone bonnet, signal processing circuit, it is characterized in that being connected with between earphone base and microphone stand the separate cavities that contains the sound via hole, the microphone that the model that has two axis to stagger mutually on the microphone head is identical has voice signal and the song treatment circuit that disappears, earphone anti-noise signal processing and mixing amplifying circuit in the signal processing circuit.
2, the multi-functional headset of environmental noise inhibition type as claimed in claim 1 is characterized in that microphone stand is subjected to face to be shaped as spill, in the cavity that spill is formed by the face and the separate cavities back side at least one slit is arranged.
3, the multi-functional headset of environmental noise inhibition type as claimed in claim 2 is characterized in that slit is three, is evenly distributed on microphone stand and is subjected in the cavity of face and the formation of the separate cavities back side.
4, as claim 1 or the multi-functional headset of 2 or 3 described environmental noise inhibition types, it is characterized in that the axis of two microphones on the microphone head is orthogonal.
5, as claim 1 or the multi-functional headset of 2 or 3 described environmental noise inhibition types, it is characterized in that voice signal and the song treatment circuit that disappears in the signal that receives the output of microphone head is arranged and regulates the duplex potentiometer W of volume 1, respectively by input 2., 5. pin be connected with duplex potentiometer contain ic chip 1aInverting amplifier and contain ic chip 1bIn-phase amplifier, with the R sound channel and the IC of circuit (expansion end) 1b, 5. pin connect by C 6, R 9The high pass filter that constitutes is connected to the potentiometer VR on the left and right sound channels 1, respectively with IC 1a, IC 1bThe load resistance VR that output connects 2
6, the multi-functional headset of environmental noise inhibition type as claimed in claim 5, it is characterized in that voice signal and the song treatment circuit that disappears in have and load resistance VR 2With socket CK 2Connect by resistance R 5, R 6, capacitor C 3The voltage divider that constitutes.
7,, it is characterized in that earphone anti-noise signal processing and mix in the amplifying circuit that ic chip is arranged as claim 1 or the multi-functional headset of 2 or 3 described environmental noise inhibition types 2a, IC 2bThe inverting amplifier that is connected into.
8, the multi-functional headset of environmental noise inhibition type as claimed in claim 4 is characterized in that earphone anti-noise signal processing and mixes in the amplifying circuit that ic chip is arranged 2a, IC 2bThe inverting amplifier that is connected into.
9, the multi-functional headset of environmental noise inhibition type as claimed in claim 5 is characterized in that earphone anti-noise signal processing and mixes in the amplifying circuit that ic chip is arranged 2a, IC 2bThe inverting amplifier that is connected into.
10, the multi-functional headset of environmental noise inhibition type as claimed in claim 6 is characterized in that earphone anti-noise signal processing and mixes in the amplifying circuit that ic chip is arranged 2a, IC 2bThe inverting amplifier that is connected into.
CN 200420032967 2004-02-24 2004-02-24 Environment noise inhibitory type multifunctional earphone Expired - Fee Related CN2701203Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200420032967 CN2701203Y (en) 2004-02-24 2004-02-24 Environment noise inhibitory type multifunctional earphone

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Application Number Priority Date Filing Date Title
CN 200420032967 CN2701203Y (en) 2004-02-24 2004-02-24 Environment noise inhibitory type multifunctional earphone

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CN2701203Y true CN2701203Y (en) 2005-05-18

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CN 200420032967 Expired - Fee Related CN2701203Y (en) 2004-02-24 2004-02-24 Environment noise inhibitory type multifunctional earphone

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106840109A (en) * 2017-01-20 2017-06-13 长沙全度影像科技有限公司 A kind of single pixel imaging hardware system based on difference

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106840109A (en) * 2017-01-20 2017-06-13 长沙全度影像科技有限公司 A kind of single pixel imaging hardware system based on difference

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GR01 Patent grant
C19 Lapse of patent right due to non-payment of the annual fee
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