RU94037385A - Microphone amplification system - Google Patents

Microphone amplification system

Info

Publication number
RU94037385A
RU94037385A RU94037385/28A RU94037385A RU94037385A RU 94037385 A RU94037385 A RU 94037385A RU 94037385/28 A RU94037385/28 A RU 94037385/28A RU 94037385 A RU94037385 A RU 94037385A RU 94037385 A RU94037385 A RU 94037385A
Authority
RU
Russia
Prior art keywords
signals
microphones
differential amplifier
microphone
amplification
Prior art date
Application number
RU94037385/28A
Other languages
Russian (ru)
Inventor
П.Г. Кондрашов
К.А. Култыгин
С.А. Генералов
Original Assignee
Товарищество с ограниченной ответственностью Научно-производственная фирма "Лифтмонтаж"
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Товарищество с ограниченной ответственностью Научно-производственная фирма "Лифтмонтаж" filed Critical Товарищество с ограниченной ответственностью Научно-производственная фирма "Лифтмонтаж"
Priority to RU94037385/28A priority Critical patent/RU94037385A/en
Publication of RU94037385A publication Critical patent/RU94037385A/en

Links

Abstract

FIELD: acoustics, amplification of signals of sound frequencies and acoustic signals. SUBSTANCE: while microphone amplification system operates its microphones receive background signals having same level in similar manner. Two approximately identical signals go from both microphones to inputs of differential amplifier and differential amplifier subtracts them mutually. Since specified signals are almost equal signal of back-ground sounds is practically not available across output of amplifier. Voice when microphones are used acts on them in greater degree as holes and microphones are close to mouth of speaker which leads to disbalance of differential amplifier. EFFECT: improved degree of amplification.

Claims (1)

Изобретение относится к технике усиления сигналов звуковых частот и предназначено для усиления акустических сигналов. Сущность изобретения: при работе системы микрофоны одинаково воспринимают фоновые звуковые сигналы, имеющие одинаковый уровень. Два почти одинаковых сигнала с обоих микрофонов поступают на входы дифференциального усилителя и дифференциальный усилитель их взаимно вычитает. Поскольку указанные сигналы почти одинаковы, сигнал от фоновых звуков на выходе усилителя практически отсутствует. При работе с микрофонами голос в большей степени воздействует на микрофон, поскольку отверстия и микрофон находятся вблизи рта говорящего, что приводит к разбалансу сигналов на выходе дифференциального усилителя.The invention relates to techniques for amplifying audio signals and is intended to amplify acoustic signals. The essence of the invention: during the operation of the system, microphones equally perceive background sound signals having the same level. Two almost identical signals from both microphones are fed to the inputs of the differential amplifier and the differential amplifier subtracts them mutually. Since these signals are almost identical, the signal from the background sounds at the output of the amplifier is practically absent. When working with microphones, the voice affects the microphone to a greater extent, since the holes and the microphone are located near the mouth of the speaker, which leads to an imbalance of the signals at the output of the differential amplifier.
RU94037385/28A 1994-09-26 1994-09-26 Microphone amplification system RU94037385A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU94037385/28A RU94037385A (en) 1994-09-26 1994-09-26 Microphone amplification system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU94037385/28A RU94037385A (en) 1994-09-26 1994-09-26 Microphone amplification system

Publications (1)

Publication Number Publication Date
RU94037385A true RU94037385A (en) 1997-05-27

Family

ID=48432598

Family Applications (1)

Application Number Title Priority Date Filing Date
RU94037385/28A RU94037385A (en) 1994-09-26 1994-09-26 Microphone amplification system

Country Status (1)

Country Link
RU (1) RU94037385A (en)

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