SU1580592A1 - Sound-amplifying device for people with hearing defects - Google Patents
Sound-amplifying device for people with hearing defects Download PDFInfo
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- SU1580592A1 SU1580592A1 SU874188442A SU4188442A SU1580592A1 SU 1580592 A1 SU1580592 A1 SU 1580592A1 SU 874188442 A SU874188442 A SU 874188442A SU 4188442 A SU4188442 A SU 4188442A SU 1580592 A1 SU1580592 A1 SU 1580592A1
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- pass filter
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Abstract
Изобретение относитс к сурдотехнике и предназначено дл людей с дефектами слуха. Цель изобретени вл етс снижение уровн нелинейных искажений. Устройство содержит в каждом канале частотный фильтр 2 и компандерный усилитель 3. Новым в предложенном устройстве вл етс введение на выходе каждого усилител дополнительного фильтра 4 нижних частот с определенной частотой среза. 1 ил.This invention is related to earphones and is intended for people with hearing impairments. The purpose of the invention is to reduce the level of non-linear distortion. The device contains in each channel a frequency filter 2 and a compander amplifier 3. New in the proposed device is the introduction of an additional low-pass filter 4 at the output of each amplifier with a certain cutoff frequency. 1 il.
Description
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Изобретение относитс к области сурдотехники и предназначено дл усилени речевых сообщений дл людей с дефектами слуха.The invention relates to the field of deaf engineering and is intended to enhance speech messages for people with hearing impairments.
Цель изобретени снижение уровг н нелинейных искажений.The purpose of the invention is to reduce the level of non-linear distortion.
На чертеже показана структурна схема устройства.The drawing shows a block diagram of the device.
Входна шина 1 устройства св зана через несколько каналов, каждый из которых содержит последовательно соединенные фильтр 2 верхних частот, ком- пандерный усилитель 3 и фильтр.4 нижних частот, и сумматор 5 с выходной шиной 6. К входной шине 1 может подключатьс микрофон, а к выходной - электроакустический преобразователь (не показаны). Характеристики усилителей 3 каналов вл ютс центрально-сим-jg метрйчными, а граничные частоты фильтров 4 нижних частот менее чем в три раза превышают соответствующие частоты фильтров 2. Число каналов выбираетс с условием соблюдени этого приз-25 нака заданного перекрыти каналов и полного диапазона усиливаемых частот.The device input bus 1 is connected through several channels, each of which contains a high-pass filter 2, a booster amplifier 3 and a low-pass filter 4, and an adder 5 with an output bus 6. Each microphone can be connected to the input bus 1, and to the output - electroacoustic transducer (not shown). The characteristics of the 3-channel amplifiers are central-sim-jg metric, and the cutoff frequencies of the 4 low-pass filters are less than three times the corresponding frequencies of the filters 2. The number of channels is selected subject to this prize-25 per set channel overlap and full range of amplified frequencies .
Устройство работает следующим образом .The device works as follows.
Речевой сигнал поступает на входы всех фильтров 2, который в одном канале срезает все частоты ниже, например , 200 Гц. При симметричном нелинейном усилении в -усилителе 3 в сигнале по вл ютс нежелательные нечетные гармоники , т.е. с частотами 600.,The speech signal is fed to the inputs of all filters 2, which in one channel cuts off all frequencies below, for example, 200 Hz. With symmetric non-linear amplification in α-amplifier 3, unwanted odd harmonics appear in the signal, i.e. with frequencies of 600.,
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JOOO Гц и т.д Благодар наличию , фильтра 4 с частотой среза, меньшей, например, 600 Гц, все эти гармонические составл ющие отфильтровываютс и на сумматор 5 приход т сигналы без нежелательных искажений.JOOO Hz, etc. Due to the presence of a filter 4 with a cutoff frequency of, for example, less than 600 Hz, all these harmonic components are filtered out and signals without undesirable distortion come to adder 5.
Описанное устройство мржет.сн ть затруднени при воспри тии речи слабослышащими из-за нелинейных искажений речи при усилении электрических сигналов , соответствующих речевым -сообщени м .The described device is difficult to perceive when hearing speech is hard of hearing due to nonlinear speech distortions when amplifying electrical signals corresponding to voice-related messages.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU874188442A SU1580592A1 (en) | 1987-02-03 | 1987-02-03 | Sound-amplifying device for people with hearing defects |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU874188442A SU1580592A1 (en) | 1987-02-03 | 1987-02-03 | Sound-amplifying device for people with hearing defects |
Publications (1)
Publication Number | Publication Date |
---|---|
SU1580592A1 true SU1580592A1 (en) | 1990-07-23 |
Family
ID=21283256
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU874188442A SU1580592A1 (en) | 1987-02-03 | 1987-02-03 | Sound-amplifying device for people with hearing defects |
Country Status (1)
Country | Link |
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SU (1) | SU1580592A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4338215A1 (en) * | 1993-11-09 | 1995-05-11 | Geers Wolfgang | Method for determining the initial setting of hearing aids |
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1987
- 1987-02-03 SU SU874188442A patent/SU1580592A1/en active
Non-Patent Citations (1)
Title |
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Патент US 4622440, кл. Н 04 R 25/00, опублик. 1986. Патент РСТ № 85/02085, кл. Н 04 R 25/00, опублик. 1986. * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4338215A1 (en) * | 1993-11-09 | 1995-05-11 | Geers Wolfgang | Method for determining the initial setting of hearing aids |
DE4338215C2 (en) * | 1993-11-09 | 2002-02-07 | Geers Wolfgang | Procedure for optimizing the fitting of hearing aids |
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