NDLI: Use of solid-state acoustic transducers in communications

Please wait, while we are loading the content...

Use of solid-state acoustic transducers in communications

Content Provider	IEEE Xplore Digital Library
Author	Mason, W.
Copyright Year	1966
Abstract	Semiconductor and solid-state devices have been used extensively to measure and generate stresses and stress waves in solids, liquids, and gases. Semiconductor devices have been used as strain gauges to measure strains and to respond to acoustic pressures, p-type silicon has a gauge factor of over 100 times that of a metallic strain gauge. By using the amplifying regimes of Esaki diodes and transistors, a great increase in sensitivity is obtained and microphones have been constructed that are more sensitive than the carbon microphone. With the advent of monolithic transistor on single chips and films, it appears likely that the most stable and economical devices are obtained by separating the pickup and amplifying functions. p-n junctions have a region (the depletion region) where electrons are excluded and if the semiconductor is piezoelectric, very high-frequency transducers for generating mechanical waves in solids can be produced. Evaporation techniques can also be used to produce frequencies from lower ranges to very high-frequency ranges. With the advent of more highly coupled piezoelectric crystals and ceramics, this technique may be extended further. Solid-state transducers have also been constructed using the Hall effect and the magnetoresistance effect. These have been applied in measuring static and dynamic fluxes, as variable resistors without sliding contacts and as displacement meters and microphones.
Starting Page	13
Ending Page	18
Page Count	6
File Size	789219
File Format	PDF
ISSN	00189278
Volume Number	19
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1971-03-01
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Solid state circuits Acoustic transducers Strain measurement Microphones Acoustic measurements Piezoelectric transducers Stress measurement Liquids Gases Semiconductor devices
Content Type	Text
Resource Type	Article
Subject	Signal Processing Engineering Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in