منابع مشابه
Microphones and Measurements
This paper presents the current status of an ongoing investigation of differences in formant estimates of vowels that may come about solely due to the circumstances of the recording of the speech material. The impact of the interplay between type and placement of microphone and room acoustics are to be examined for adult males and females across a number of vowel qualities. Furthermore, two est...
متن کاملNoise in miniature microphones.
The internal noise spectrum in miniature electret microphones of the type used in the manufacture of hearing aids is measured. An analogous circuit model of the microphone is empirically fit to the measured data and used to determine the important sources of noise within the microphone. The dominant noise source is found to depend on the frequency. Below 40 Hz and above 9 kHz, the dominant sour...
متن کاملModelling distortion in condenser microphones
Preface In the scope of my studies at the Technical University of Denmark (DTU) in the Engineering Acoustics master program, I have done my final project about modelling distortion in condenser microphones. This subject was originally proposed by Brüel & Kjaer Sound & Vibration Measurement A/S (B&K) under the title Distortion process in condenser microphones. In February 2009 I have started my ...
متن کاملA brief history of microphones
In the beginning The German physicist Johann Philipp Reis (1834–1874) is a strong candidate for the title. His design for a 'sound transmitter' (optimised around 1861), used a metallic strip resting on a membrane with a metal point contact completing an electrical circuit. It was Reis's theory that, as the membrane vibrated, the metal point bounced up and down ‘producing intermittent contact an...
متن کاملModelling of silicon condenser microphones
Several models concemmg the senslhvlty of capaclhve pressure sensors have been presented m the past Modellmg of condenser nucrophones, which can be constdered to be a specml type of capacltlve pressure sensor, usually reqmres a more comphcated analysis of the senstttvlly, because they have a strong electnc field m the atr gap It IS found that tbe mechamcal sensltlvlty of condenser rmcrophones ~...
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ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1941
ISSN: 0001-4966
DOI: 10.1121/1.1902225