IJRE – Volume 4 Issue 4 Paper 6

MICROPHONE WITH ELECTRO-MECHANIZED GAIN CONTROL

Author’s Name :  Sherlin Synthica R | Dr S N Deepa

Volume 04 Issue 04  Year 2017  ISSN No:  2349-252X  Page no: 27-31

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Abstract:

Peak amplitudes of the input signals to the microphone generally affect the life and performance of the speakers and might also hurt our ears. Advertently, if the microphone receives weak sound waves it cannot convert into audio signals which means it fails to perform the function of a transducer. The solution is to control these input signals within the microphone itself. This can be done by designing few compact devices and integrating them into one single circuit which will be connected to the transducer and packed inside the microphone. Doing this will also help in attenuating whistles and howls caused by feedback loops.

Key Words:

Transducer; Compressor; Pre-amplifier

References:

  1. B. D. Griffith and J. Tom (U. S. Army) “Audio Automatic Volume Control Circuit” Radio Corp. of America, Camden, at special circuits Chairman: P. L. Bargellini, University of Pa
  2. Inventor: Michael D. Monkowski “Automatic Gain Control in a Speech Recognition System”, New Windsor, NY(US)
  3. Jerad Lewis “Understanding Microphone Sensitivity”; Analog Dialogue 46-05 Back Burner, May (2012)
  4. Carlos Camargo “Compressing Audio Signals with the Use of the Wavelet Transform and Embedded Systems”©2013 IEEE, Departament of Electrónica, Facultad de Ingeniería, Universidad Nacional de Colombia. Bogotá, Colombia.cicamargoba@unal.edu.co
  5. H.F.Olson, “Polydirectional microphone”,RCA Laboratories, Princeton,New Jersey
  6. C.Marro, “Analysis of noise reduction and dereverberation techniques based on microphone arrays with post filtering”,France Telecom, CNET, Lannion, France
  7. https://music.tutsplus.com/tutorials/the-beginners-guide-to-compression-audio-953
  8. http://www.yamahaproaudio.com/global/en/training_support/selftraining/pa_guide_beginner/compressor/
  9. https://www.kvraudio.com/forum/viewtopic.php?t=211220
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