CN104936117A - Binaural hearing aid device used in cooperation with Bluetooth headset - Google Patents
Binaural hearing aid device used in cooperation with Bluetooth headset Download PDFInfo
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- CN104936117A CN104936117A CN201410096940.5A CN201410096940A CN104936117A CN 104936117 A CN104936117 A CN 104936117A CN 201410096940 A CN201410096940 A CN 201410096940A CN 104936117 A CN104936117 A CN 104936117A
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Abstract
The invention relates to a binaural hearing aid device used in cooperation with a Bluetooth earphone, which is characterized in that a sound pickup module (1) collects environmental sounds and sends the environmental sounds to an audio signal processing module (2), and the noise reduction processing and differential signal processing are sequentially carried out on audio signals; then the left and right sound channel differential signals are amplified by a dual-sound channel power amplification module (3) respectively; the dual-track power amplifier module (3) is connected with the audio input end of the Bluetooth SRC audio information source module (4); the Bluetooth SRC audio frequency information source module (4) is used as a master device of a piconet, searches a stereo Bluetooth earphone (8) within a range of 10 meters and establishes wireless audio frequency data connection of an ACL asynchronous link by default; and the amplified left and right channel differential signals are transmitted to a stereo Bluetooth earphone (8) and played, so that the binaural hearing aid is realized.
Description
Technical Field
The invention relates to a binaural hearing aid device matched with a Bluetooth earphone, belonging to the technical field of hearing aid devices.
Background
Hearing function deterioration in the elderly is a common phenomenon and increases year by year with increasing age. An electronic hearing aid is generally used for people who have no medical treatment available, and is a small sound amplifying device used by hearing-impaired people and used for compensating hearing loss. The first hearing aid with carbon hearing was invented by the american scientist Bell since 1878. Hearing aids have been developed over a hundred years and are now popular primarily in the form of boxes, glasses, behind-the-ear, custom, concealed, open, standard ear canals and other types.
The box-type hearing aids are used by children and the old, have larger volume, can be provided with a plurality of function adjusting switches, provide better acoustic performance, and can be easily manufactured into a high-power type so as to meet the requirements of serious deafness children. And because of the large volume and easy manufacture, the device has low price, is popular with deaf patients and is often taken as the first choice of entry-level machines. The main machine of the hearing aid is similar to a cigarette box in volume and is hung in a small bag in front of the chest or a pocket, the main machine is connected with an earphone through a lead and is inserted into an external auditory canal for use, and the main defect is that the lead is long and is not attractive and inconvenient. Moreover, the hearing aids are generally designed in a single-channel mode, the inconsistency of the hearing abilities of the ears of deaf patients is not considered, and the hearing aids cannot be used for listening to the ears even though a stereo earphone is inserted. Not only speech recognition rate is low, but also long-term monaural hearing aid can generate hearing deprivation effect, which causes hearing impairment to be more serious.
The behind-the-ear hearing aids are used by adults mostly, and are shaped like banana curviness, and generally have a length of about 4-5 cm after lying behind the ear. The opening of the receiver is connected with a sound guiding hook made of hard plastic tube, and the sound guiding hook is hung at the root part of the upper edge of the auricle, so that the hook is put into the concha cavity and the ear canal for hearing aid through the plastic tube and the ear mold earplug. When the hair-care product is worn, the hair-care product is hidden behind the ears and is often not found by the outsiders, and the psychological requirements of the deaf people can be met. However, the opening of the receiver is too close to the sound pick-up, so that the phenomenon of 'howling' is easy to occur, and a wearer feels uncomfortable and even feels mentally contradictory. In addition, all function adjusting switches are integrated in the hearing aid, and the main machine is hung on the upper edge of the auricle when the hearing aid is used, so that the operation is inconvenient. And the load-bearing capacity of ears is limited, and the hearing aids are usually small, so that the hearing aids have the advantage of being convenient to hide, but for the old, the functional adjusting switches, battery doors and the like on the hearing aids need to be frequently operated, so that the sizes of parts are too small, and the operation is extremely inconvenient.
Other types of hearing aids are expensive due to their small size or customized nature, and are not as versatile as box and behind-the-ear type hearing aids.
On the other hand, bluetooth technology has rapidly developed in recent years, which is a radio technology supporting short-range communication (generally within 10 meters) of devices. Through the Bluetooth technology, wireless information exchange can be carried out among a plurality of devices including mobile phones, PDAs, wireless earphones, notebook computers, related peripheral equipment and the like. Bluetooth technology has low radiation relative to other wireless technologies, and operates in the global ISM (i.e., industrial, scientific, medical) band of 2.4 GHz. On the other hand, the Bluetooth earphone applies the Bluetooth technology to the hands-free earphone, so that the user can avoid the wire stumbling. At present, the Bluetooth headset is very popular, the Bluetooth headset with an A2DP stereo protocol can be bought by dozens of yuan, the ergonomics is well made, the comfort level of wearing single and double ears for a long time is good, and the appearance is attractive and fashionable. No binaural hearing aid device is known for use with such devices.
Disclosure of Invention
It is an object of the present invention to overcome the above-mentioned deficiencies of the prior art hearing aids and to provide a binaural hearing aid device for use with a bluetooth headset.
The purpose of the invention can be realized by the following technical scheme:
a binaural hearing aid device for use with bluetooth headphones, comprising seven parts: the system comprises a sound pick-up module (1), an audio signal processing module (2), a dual-channel power amplifier module (3), a Bluetooth SRC audio information source module (4), a power management module (5), a battery module (6) and a shell (7).
The pickup module (1) collects environmental sounds and sends the environmental sounds to the audio signal processing module (2), and noise reduction processing and differential signal processing are sequentially carried out on the audio signals; then the left and right sound channel differential signals are amplified by the dual-sound channel power amplification module (3) respectively; the dual-track power amplifier module (3) is connected with the audio input end of the Bluetooth SRC audio source module (4); the Bluetooth SRC audio frequency information source module (4) is used as a master device of a piconet, searches a stereo Bluetooth earphone (8) within a range of 10 meters and establishes wireless audio frequency data connection of an ACL asynchronous link by default; and the amplified left and right channel differential signals are transmitted to a stereo Bluetooth earphone (8) and played, so that the binaural hearing aid is realized.
1~2 electret microphones are arranged in the sound pickup module (1).
The audio signal processing module (2) comprises 2~3 independent noise reduction circuits (9) and differential signal processing circuits (10) which are respectively provided with different parameter components, 1 of the noise reduction circuits (9) is switched and selected by an audio switch (11) when the audio signal processing module works, the analog audio signal is subjected to noise reduction processing, and then the analog audio signal is converted into differential audio signals of a left channel and a right channel through the differential signal processing circuits (10) and then output.
The dual-channel power amplifier module (3) contain 2 sets of independent analog audio signal amplifier circuits, 2 drive plate potentiometers are used for respectively and independently adjusting the volume of the left and right channels, 1 AUX audio interface of 2.5mm is connected with the output end of the audio signal processing module (2) and used for externally connecting analog audio output of third-party media (television accompanying sound, MP3 music, radio, telephone and the like), and 1 AUX audio interface of 3.5mm is connected with the audio input end of the Bluetooth SRC audio information source module (4) and used for providing audio output under the conditions of Bluetooth earphone failure, low electric quantity and the like and used for standby wired earphones.
The Bluetooth SRC audio source module (4) is an audio source end Bluetooth module supporting an A2DP framework protocol, and comprises an audio codec and a voice processing DSP module supporting the A2DP, 1 LED pairing indicator lamp displaying the current pairing state, and 1 button for Bluetooth pairing.
The power management module (5) comprises: a signal isolation circuit (12) and a charge-discharge protection circuit (13).
The battery module (6) is characterized in that: one of lithium ion polymer battery, lithium ion battery, nickel-hydrogen battery, nickel-cadmium battery, lead-acid battery and zinc-manganese battery.
The stereo Bluetooth headset (8) is characterized in that: a commercially available stereo two-channel bluetooth headset supporting the A2DP framework protocol.
The signal isolation circuit (12) is used for isolating power supplies of the Bluetooth SRC audio signal source module (4) and the dual-channel power amplifier module (3) so as to eliminate signal interference between the modules caused by a common ground wire.
The charge and discharge protection circuit (13) is connected with the battery module (6) and comprises: 1 toggle power switch, 1~4 LED indicator lamps for displaying the electric quantity state, and 1 Micro-USB or Mini-USB power charging interface, allowing an external power supply to input 4-6V voltage and 50-1000mA current; 1 USB or Mini-USB power output interface, which allows the output of 4-6V voltage and 10-500mA current to the load.
Compared with the prior art, the invention has the following advantages;
1. the Bluetooth technology which is harmless to human bodies is used, so that the wireless performance of the box type hearing aid is realized, and the box type hearing aid is convenient to carry and use;
2. the distance between the sound pickup and the loudspeaker is widened by using the Bluetooth technology, so that howling of the behind-the-ear hearing aid is avoided;
3. the invention has no limit on the volume and flexible size design of the components such as function adjustment and the like because the ear pinna does not need to be worn;
4. the earphone is matched with a commercially available stereo Bluetooth earphone with mature technology, so that the development cost of the whole earphone is low, and the earphone is comfortable to wear by single and double ears;
5. the device is worn by two ears, the volume of the two ears can be freely adjusted by a user, and the hearing deprivation effect is eliminated to the maximum extent;
6. the invention provides the USB or Mini-USB interface of the power output, which can charge the Bluetooth headset at any time and increase the endurance.
Drawings
FIG. 1 is a functional diagram of the present invention.
Fig. 2 is a block diagram of the present invention.
Detailed Description
The technical scheme of the invention is explained in detail in the following with the accompanying drawings: fig. 1 shows a binaural hearing aid device for use with a bluetooth headset. The invention collects the sound of the external environment, and sends out the audio signal through the Bluetooth technology after a series of audio processing such as noise reduction processing, differential signal processing, independent dual-track power amplification and the like. After being matched with a commercially available stereo Bluetooth headset (8), the function of binaural hearing aid can be realized.
When the user uses the invention for the first time, the user needs to pair with the stereo Bluetooth headset (8). First, a power switch is turned on, a power indication LED on the machine body is lightened and displays the condition of approximate electric quantity, and an LED pairing indicator lamp flickers to indicate that the machine body is not paired currently. The user tunes a commercially available stereo two-channel bluetooth headset to a pairing mode. The user presses the dedicated button of bluetooth pairing on the fuselage again, and afterwards, LED pairs the pilot lamp and stops the scintillation, accomplishes to pair promptly. At this time, the bluetooth headset makes a sound. The user can adjust the volume of the left ear and the right ear according to the hearing condition of the user.
After use, the power switch is directly turned off to complete shutdown. The invention can be charged by plugging in a Mini-USB plug.
When the user uses the invention again, the user can directly open the power switch of the invention and open the stereo Bluetooth earphone (8) to realize the wireless connection between the devices.
The invention and the stereo Bluetooth earphone (8) have no requirement on the on-off sequence.
Fig. 2 shows the structure and the interconnection between the modules according to the present invention.
The invention mainly comprises 7 parts: the system comprises a sound pick-up module (1), an audio signal processing module (2), a dual-channel power amplifier module (3), a Bluetooth SRC audio information source module (4), a power management module (5), a battery module (6) and a shell (7).
The audio signal processing scheme related to the present invention, which is indicated by the dotted arrow in fig. 2, is implemented by three steps:
the sound pickup module (1) collects environmental sound and sends the environmental sound to the audio signal processing module (2), and the noise reduction processing and the differential signal processing are sequentially carried out on the audio signal. The audio signal processing module (2) comprises 2~3 independent noise reduction circuits (9) and differential signal processing circuits (10) which are respectively provided with different parameter components, 1 of the noise reduction circuits (9) is switched and selected by an audio switch (11) when the audio signal processing module works, the analog audio signal is subjected to noise reduction processing, and then the analog audio signal is converted into differential audio signals of a left channel and a right channel through the differential signal processing circuits (10) and then output;
【and secondly, amplifying the left and right sound channel differential signals by a dual-sound channel power amplification module (3) respectively. The dual-channel power amplifier module (3) comprises 2 sets of independent analog audio signal amplifying circuits, and a user can independently adjust the volume of the left and right channels respectively through 2 dial potentiometers in the amplifying circuits so as to adapt to the requirement of two ears on inconsistent volume. The module comprises 1 AUX audio interface with 2.5mm which is connected with the output end of the audio signal processing module (2) and can be used for outdoor connection with analog audio output by third-party media (television accompanying sound, MP3 music, radio, telephone and the like). The Bluetooth headset comprises 1 AUX audio interface with the length of 3.5mm, which is connected with an audio input end of a Bluetooth SRC audio source module (4) and used for providing audio output under the conditions of Bluetooth headset failure, low electric quantity and the like for standby wired headsets;
【and thirdly, the dual-channel power amplifier module (3) is connected with the audio input end of the Bluetooth SRC audio information source module (4), and amplified left and right channel differential signals are transmitted to the stereo Bluetooth earphone (8) and played through the Bluetooth SRC audio information source module (4), so that the binaural hearing aid is realized. The Bluetooth SRC audio source module (4) is used as a master device of a piconet, searches a stereo Bluetooth headset (8) within a range of 10 meters and establishes wireless audio data connection of an ACL asynchronous link by default; and the amplified left and right channel differential signals are transmitted to a stereo Bluetooth earphone (8) and played, so that the binaural hearing aid is realized.
The power supply scheme of the present invention, which is indicated by the thick solid arrows in fig. 2, has the following features:
1. the battery module (6) of the invention is preferably a lithium battery, and is connected by a power management module (5) to provide charge and discharge management. And the other modules are all provided with 5V direct current by a power management module (5). The power management module (5) comprises a signal isolation circuit (12) and a charge-discharge protection circuit (13);
2. the signal isolation circuit (12) isolates power signals of the Bluetooth SRC audio signal source module (4) and the dual-channel power amplifier module (3) respectively so as to eliminate signal interference between the modules caused by a common ground wire;
3. the charge-discharge protection circuit (13) is connected with the battery module (6) and comprises: 1 toggle power switch, 1~4 LED indicator lamps for displaying the electric quantity state, and 1 Micro-USB or Mini-USB power charging interface, wherein an external power supply is allowed to input 4 to 6V voltage and 50 to 1000mA current; 1 USB or Mini-USB power output interface allows the output of 4 to 6V voltage and 10 to 500mA current for load, and the stereo Bluetooth earphone (8) can be charged through the interface.
Claims (10)
1. A binaural hearing aid device matched with a Bluetooth earphone for use is characterized in that a sound pickup module (1), an audio signal processing module (2), a dual-channel power amplifier module (3), a Bluetooth SRC audio information source module (4), a power management module (5), a battery module (6) and a shell (7) are formed by seven parts; the pickup module (1) collects environmental sounds and sends the environmental sounds to the audio signal processing module (2), and noise reduction processing and differential signal processing are sequentially carried out on the audio signals; then the left and right sound channel differential signals are amplified by a dual-sound channel power amplification module (3) respectively; the dual-track power amplifier module (3) is connected with the audio input end of the Bluetooth SRC audio information source module (4); the Bluetooth SRC audio frequency information source module (4) is used as a master device of a piconet, searches a stereo Bluetooth earphone (8) within a range of 10 meters and establishes wireless audio frequency data connection of an ACL asynchronous link by default; and the amplified left and right channel differential signals are transmitted to a stereo Bluetooth earphone (8) and played, so that the binaural hearing aid is realized.
2. A binaural hearing aid device for use with bluetooth enabled headphones according to claim 1, characterized in that there are 1~2 electret microphones in said microphone module (1).
3. A binaural hearing aid device used in combination with a bluetooth headset according to claim 1, wherein the audio signal processing module (2) comprises 2~3 independent noise reduction circuits (9) and a difference signal processing circuit (10) each configured with different parameter components, and when in operation, the audio switch (11) switches and selects 1 of the noise reduction circuits (9), performs noise reduction processing on the analog audio signal, and then converts the analog audio signal into a difference audio signal of left and right channels through the difference signal processing circuit (10) and outputs the difference audio signal.
4. The binaural hearing aid device according to claim 1, wherein the binaural hearing aid device comprises a binaural power amplifier module (3) comprising 2 sets of independent analog audio signal amplifier circuits, 2 dial potentiometers for respectively and independently adjusting the volume of the left and right channels, 1 2.5mm AUX audio interface connected to the output end of the audio signal processing module (2), and 1 3.5mm AUX audio interface connected to the audio input end of the bluetooth SRC audio source module (4).
5. The binaural hearing aid device according to claim 1, wherein the bluetooth SRC audio source module (4) is an audio source bluetooth module supporting an A2DP framework protocol, and comprises an audio codec and a voice processing DSP module supporting an A2DP framework protocol, 1 LED pairing indicator light for displaying the current pairing status, and 1 bluetooth pairing key.
6. A binaural hearing aid device for use with bluetooth headsets according to claim 1, characterized in that said power management module (5) comprises: a signal isolation circuit (12) and a charge-discharge protection circuit (13).
7. A binaural hearing aid device according to claim 1, for use with bluetooth headsets, characterized in that the battery module (6) is: one of a lithium ion polymer battery, a lithium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery and a zinc-manganese battery.
8. A binaural hearing aid device for use with bluetooth headsets according to claim 1, characterized in that said stereo bluetooth headset (8) is: a commercially available stereo two-channel bluetooth headset supporting the A2DP framework protocol.
9. The binaural hearing aid device according to claim 6, wherein the signal isolation circuit (12) isolates the power signals of the Bluetooth SRC audio source module (4) and the binaural power amplifier module (3), respectively.
10. A binaural hearing aid device according to claim 6, for use with a Bluetooth headset, characterized in that said charge/discharge protection circuit (13) is connected to a battery module (6) comprising: 1 toggle power switch, 1~4 LED indicator lamps for displaying the electric quantity state, and 1 Micro-USB or Mini-USB power charging interface, allowing an external power supply to input 4-6V voltage and 50-1000mA current; 1 USB or Mini-USB power output interface, which allows the output of 4-6V voltage and 10-500mA current to the load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410096940.5A CN104936117A (en) | 2014-03-17 | 2014-03-17 | Binaural hearing aid device used in cooperation with Bluetooth headset |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410096940.5A CN104936117A (en) | 2014-03-17 | 2014-03-17 | Binaural hearing aid device used in cooperation with Bluetooth headset |
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| CN104936117A true CN104936117A (en) | 2015-09-23 |
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| CN201410096940.5A Pending CN104936117A (en) | 2014-03-17 | 2014-03-17 | Binaural hearing aid device used in cooperation with Bluetooth headset |
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Cited By (2)
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| CN108778410A (en) * | 2016-03-11 | 2018-11-09 | 梅约医学教育与研究基金会 | The cochlear stimulation system eliminated with surround sound and noise |
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| CN108778410A (en) * | 2016-03-11 | 2018-11-09 | 梅约医学教育与研究基金会 | The cochlear stimulation system eliminated with surround sound and noise |
| CN108778410B (en) * | 2016-03-11 | 2022-05-27 | 梅约医学教育与研究基金会 | Cochlear stimulation system with surround sound and noise cancellation |
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Application publication date: 20150923 |