与 «ELECTRET»相关的英语书籍
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1
Electret Effect in Cement
3.1 Introduction Understanding the electret effect of cement is necessary in order
make practical use of the effect. The parameters governing the electret formation
could be broadly classified into the following: (i) current and its time period of ...
Rajagopal Panchapakesan, 2007
2
Beginning Analog Electronics Through Projects
Project #10: Dual-Gain Electret Microphone Audio Preamplifier For hobby
applications, the electret microphone element is an ideal update to the older
carbon microphone. The electret microphone element is compact, sensitive, and
easy to ...
For further information on condenser microphones see Merhaut,2 Rossi,1
Beranek,* and Wong and Embleton.4 2.2 Electret Microphones Electret
microphones are very similar to the condenser microphone described above. The
main ...
4
Electrets In Engineering: Fundamentals and Applications
First investigations of electret effects were undertaken at the beginning of the
twentieth century by a Japanese physicist Eguchi in 1919 [1]. Theoretically the
existence of electrets as a "permanently polarized dielectric" was forecasted
already ...
Vladimir N. Kestelman, Leonid S. Pinchuk, Victor A. Goldade, 2000
ELECTRET. CAPACITOR. PRESSURE. MICROPHONE. Electret materials have
been known for more than a century, but only in the last 35 years or so has the
electret had an impact on capacitor microphone design, bringing excellent ...
6
Radon: Prevalence, Measurements, Health Risks, and Control
Electrets A passive integrated radon measurement method that has recently
been developed commercially is an ionization chamber with an electret. An
electret is a piece of dielectric material exhibiting a quasi-permanent electrical
charge.
Niren Laxmichand Nagda, 1994
7
Handbook of Electrostatic Processes
The fundamental structure of the electret microphone is shown in Fig. 4. They
used a mylar electret film as a vibrating film (diaphragm) by sound at first, then
FEP teflon and others were now also used. A first commercial electret
microphone ...
Jen-Shih Chang, Arnold J. Kelly, Joseph M. Crowley, 1995
8
The Audio Dictionary: Third Edition, Revised and Expanded
Electret Microphone A type of condenser microphone that does not require a
polarizing voltage. The electret microphone contains on the back plate, or
inherent in the diaphragm, a material called an electret, which holds a permanent
electric ...
Glenn White, Gary J Louie, 2005
9
Capacitive Sensors: Design and Applications
Electret microphones are the only application covered in this book which do not
use high frequency excitation. A DC bias is used so the circuits are considerably
simplified. The price paid for this simplicity is the poorer noise performance, ...
10
Dielectric Phenomena in Solids: With Emphasis on Physical ...
When a charged electret with two deposited metallic electrodes is short-circuited,
there is no external current flow. However, when this electret contracts due to an
increase in the applied hydrostatic pressure or a decrease in temperature, there ...
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ASA Honors TU Darmstadt Professor for Development of Electret …
In 1962 at Bell Labs he, together with James E. West, invented the first polymer electret condenser microphone (ECM) which combined high ... «AZoNano.com, 七月 15»
An Evolution of Technology: Microphones
Of all of the types of microphones in use today, the electret ... by a team of researchers working at Bell Laboratories, the electret microphone ... «IPWatchdog.com, 七月 15»
Headset communication system operates wirelessly
Products include firm's Cygnus wireless platform, full duplex configuration, volume control, flexible noise cancelling electret boom microphone, ... «Electronic Products & Technology, 七月 15»
Tascam DR-44WL Handheld Recorder
The front features a pair of newly designed small-diaphragm electret condenser microphones; as on the DR-40, they are protected by sturdy ... «MIX, 七月 15»
Studio-quality digital mic and virtual mic locker app from IK
The one-inch back electret condenser capsule is intended to capture studio-grade recordings, with an SPL rating of 133dB. The microphone ... «E&T magazine, 六月 15»
Microphone Market Worth $1.81 Billion by 2020
The segmentation by type includes MEMS (Analog and Digital), Electret, and Other types. The segmentation of microphone market by ... «MarketWatch, 六月 15»
Review: Audio-Technica ATR6650 Shotgun Mic
As shotgun mics go, the Audio-Technica ATR6650 is traditional: long and slim. It is an electret mic powered by an internally mounted AA battery ... «Government Video, 六月 15»
Research and Markets: Microphone Market - Analysis & Forecast to …
In this market, MEMS based microphones are expected to substitute the popular traditional electret microphones. This study indicates that the ... «Yahoo Finance UK, 六月 15»
Pediatric face masks ineffective against submicron aerosols
“Besides using electret filters, developing facemasks meant for specific anthropometric features of children is a possible alternative for ... «Healio, 六月 15»
Research Article
Piezo, electret and triboelectric harvesting give a true emf because electric charges are being generated but dielectric elastomers, electrostatic ... «IDTechEx.com, 五月 15»
