CN2134017Y

CN2134017Y - Stereophonic deaf-aid

Info

Publication number: CN2134017Y
Application number: CN 92222289
Authority: CN
Inventors: 李松
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-05-16
Filing date: 1992-05-16
Publication date: 1993-05-19
Anticipated expiration: 2002-05-16

Abstract

The utility model relates to a stereophonic deaf-aid which is an electronic hearing aid. The utility model is characterized in that the stereophonic deaf-aid has two sets of microphones, audio amplification circuits and earphones which belong respectively to the left and the right sound channels, wherein, the microphone and the earphone of each sound channel are connected into integration and adorned on the ears, and the microphone and the earphone are connected with the stereophonic deaf-aid which is carried about via conductor wires. The adoption of an acoustic duct on each microphone effectively reduces the acoustic feedback so as to obtain sufficient loudness gain. The utility model can truly pick up and amplify various sound messages which arrives at the ears, which makes a patient with deafness can hear sound and sense the direction of the sound, and dizziness and other discomforts can not be caused; besides, the utility model can enhance the sound definition and reduce noise interference.

Description

Stereophonic deaf-aid

The utility model belongs to a kind of electronic hearing aid, is mainly used in the hearing of improving or recovering the imperfection deafness patient.

The hearing aids of Chu Shouing all is monaural in the market.Though some hearing aids uses the biphone playback, its pickup and amplifying circuit all are monaural, just are to use a microphone, a cover audio amplifier circuit to promote the biphone sounding as Chinese patent 87215811U disclosed " biphone hearing aids ".These monophony hearing aidss can only make the sound after the wearer hears amplification, but can't feel the direction of sound, so not only can make the people think do not have the sense of reality and presence from the sound that hearing aids is heard, and can make wearer's the sense of hearing and other sensation (as vision, sense of touch etc.) inharmonious, thereby cause malaise symptoms such as have a dizzy spell.Simultaneously, the playback on mono system has only a sounding point (when using the biphone playback, this point is positioned at people's head), various sound are all from this point, make unvanted sound (as ambient noise) very strong for sound masking action, therefore, the wearer can feel that noise is big, the definition of sound is not high, in addition, because the microphone of this class hearing aids places in the main case, when the wearer moves, the friction of casing and clothing can produce a large amount of noises, disturbs normally and uses.

The purpose of this utility model is to provide a kind of stereo hearing aids, can be amplified to the various acoustic informations at intelligent two ear places truly, make the sound after the wearer can not only hear amplification, can also feel the direction of sound, therefore have stronger sound presence, dizziness, malaise symptoms such as dizzy can not occur, simultaneously, definition, the signal to noise ratio of sound all increase, and can eliminate because of when motion clothing caused noise that rubs.

The technical solution that the utility model adopts is: use two covers to belong to microphone, audio amplifier circuit and the earphone of left and right two sound channels, constitute a stereo pickup, amplification, sound system, wherein the microphone of each sound channel and the earphone of this sound channel are combined as a whole, constitute a pickup playback assembly, be worn on people's ear, take quarantine measures between earphone and the microphone, and make pick-up point away from earphone.Power supply, switch, dual track amplifying circuit, volume controller etc. place in the main frame, main frame is put into pocket, by lead respectively with about the pickup playback assembly of two sound channels link to each other, the microphone of each sound channel can both pick up and arrive near the voice signal of this side people ear during use, be transferred to the input of this channel amplifier in the main frame through lead, after amplifying, be transferred to the earphone sound reproduction reduction of this sound channel by lead.Because each sound channel can both be picked up near the voice signal the side people ear, this side people ear is given in amplification and reduction, so the ears sound heard by earphone is exactly the actual sound that passes to the ears place that has amplified, and pass to the intensity difference of the sound at people two ear places, time difference has just comprised the directional information of sound, these information are after hearing aids amplifies, can be experienced by deafness patient undistortedly, make it produce the sense of direction of complete true nature, thereby make people's the sense of hearing feel mutually harmonious with other, can not produce malaise symptoms such as have a dizzy spell, simultaneously, because the expansion of acoustic image, can utilize sense of direction to weaken the masking action of unvanted sound (as ambient noise) to useful sound, the definition of sound is improved, and noise jamming reduces.In addition, owing to microphone is worn on the ear with earphone, so eliminated the noise jamming that the clothing friction causes fully.

Be described further below in conjunction with drawings and Examples.

Fig. 1 is stereo hearing aids theory diagram.

Fig. 2 is a pickup playback assembly profile.

Fig. 3 is a dual-channel audio amplifying circuit schematic diagram.

In the theory diagram of Fig. 1, being connected between the pickup playback assembly of each sound channel and the main frame adopted the three-core shielding line, its outer shielding layer ground connection, and and an internal core wire constitute line between earphone and the power amplifier, two internal core wires constitute the line between microphones and the amplifier in addition.

Certainly be connected an also available twin-core shielding conductor between the pickup playback assembly of each sound channel and the main frame, at this moment outer shielding layer is as output loop and the total ground wire of input circuit, one internal core wire is as the line between power amplifier and the earphone, and another internal core wire is as the line between microphone and the input amplifier.

In the pickup playback assembly profile of Fig. 2, microphone 2 places the back side of earphone 1, in order to prevent acoustic feedback between earphone and the microphone and uttering long and high-pitched sounds of causing, whole microphone places in the tubular cavity made from the bigger material of internal damping (as rubber) 3, cavity is except that the lower end has an opening 5, all the other positions are sealing, microphone 2 places the top of cavity, its face down, the tubular cavity between microphone and the opening 5 forms an acoustic conducting pipe, and its length is 3-4 centimetre, about 0.5 centimetre of diameter, opening 5 is in people's ear-lobe below when wearing, and such acoustic conducting pipe can make microphone only pick up the sound that passes to opening 5 places on the one hand, thereby makes pick-up point away from earphone, reduce acoustic feedback, can touch the sound wave resonance effect of apery duct on the other hand, the sound intensity in 2000 hertz of-3000 hertz of scopes is improved, thereby improve the definition of sound.Be filled with an amount of lint shape sound-absorbing material in the acoustic conducting pipe, play and reduce acoustic conducting pipe Q value, prevent the effect that the signal in 2000 hertz of-3000 hertz of scopes is excessively promoted.Whole tubular cavity 3 can be fixed on the back side of earphone with the gummed method.

In dual-channel audio amplifying circuit schematic diagram shown in Figure 3, adopted the low-voltage dual-channel audio amplification circuit TA8119 of Toshiba Corp, its every sound channel all comprises a pre-amplification circuit and a power amplification circuit, voltage control mode is adopted in volume control, change the height of 11 pin current potentials, just can change the size of two channel volumes simultaneously, therefore it is convenient to regulate volume, noiselessness, certainly the dual-channel audio amplifying circuit also can adopt other integrated circuit to constitute as: LA4570, CXA1034, CXA1005, AN7108 etc.The microphone of this circuit adopts the miniature electret microphone, and earphone uses 16 Ω or 32 Ω moving coil earphones.

Claims

1, a kind of by microphone, audio amplifier circuit, earphone, volume controller, the hearing aids that power supply and switch are formed, it is characterized in that: have the left side of belonging to, two cover microphones of right two sound channels, audio amplifier circuit and earphone, wherein L channel microphone and L channel earphone are installed together and constitute a pickup playback assembly, R channel microphone and R channel earphone are installed together and constitute another pickup playback assembly, two pickup playback assemblies are worn on respectively on user's the left and right sides ear, the dual-channel audio amplifying circuit, power supply, switch, volume controller is installed in the main frame of carrying, and pickup playback assembly links to each other with main frame by lead.

2, stereo hearing aids according to claim 1, it is characterized in that: microphone ［ 2 ］ is installed in the back of earphone ［ 1 ］, whole microphone places in the tubular cavity ［ 3 ］ that the bigger material of a usefulness internal damping makes, there is an opening ［ 5 ］ the cavity lower end, remainder is sealing, the microphone face down is placed in the top of tubular cavity, form an acoustic conducting pipe ［ 4 ］ between microphone and the opening ［ 5 ］, opening when wearing ［ 5 ］ is positioned at the below of ear-lobe, and acoustic conducting pipe inside is filled with the sound-absorbing material of lint shape.

3, stereo hearing aids according to claim 1, it is characterized in that: the pickup playback assembly and the line between the main frame of each sound channel are the three-core shielding lines, its outer shielding layer ground connection, and with an internal core wire as the line between audio amplifier circuit output and the earphone, all the other two internal core wires are as the line of microphone and audio amplifier circuit input.

4, stereo hearing aids according to claim 1, it is characterized in that: the pickup playback assembly of each sound channel and the line of main frame are the twin-core shielding conductors, its outer shielding layer is as the common ground wire of audio frequency amplifier output loop and input circuit, one internal core wire is as the line of audio frequency amplifier output and earphone, and another internal core wire is as the line between microphone and the amplifier in.