منابع مشابه
Computerized Multi Microphone Test System
An acoustic testing approach based on the concept of a microphone sensor surrounding the product under test is proposed. Partial microphone signals are processed simultaneously by a test system computer, according to the objective of the test. The spatial and frequency domain selectivity features of this method are examined. Sound-spatial visualization algorithm is observed. A test system desig...
متن کاملSynthesis of cyclic olefin polymers with high glass transition temperature and high transparency using tungsten-based catalyst system
Novel cyclic olefin polymers (COPs) derived from bulky cyclic olefins, tricyclodipentadiene (TCPD) and tricyclo[6.4.0.19,12]-tridec-10-ene (TTE), with high glass transition temperature (Tg), excellent thermal stability, and high transparency, have been synthesized by ring-opening metathesis polymerization (ROMP) and subsequent hydrogenation. ROMP of TCPD and TTE was carried out successfully wit...
متن کاملA High Sensitivity Polysilicon Diaphragm Condenser Microphone
This paper presents the analysis, design, fabrication, and testing of a condenser microphone utilizing a thin low-stress polycrystalline silicon diaphragm suspended above a p+ perforated back plate. The microphone is fabricated using a combination of surface and bulk micromachining techniques in a single wafer process without the need of wafer bonding. The device shows sensitivities of -34 dB (...
متن کاملA Microphone Array System for Speech Recognition
In the past year, we have studied the microphone-array placement problem and come up with some optimal placements for a linear microphone array. In so doing we have developed a new method for general nonlinear optimization which we call the Stochastic Region Contraction method. This allowed us to get optimal solutions to our problem -globally optimal -in far less time than simulated annealing w...
متن کاملHigh-speed Noise Cancellation with Microphone Array
We propose the use of a microphone array based on independent component analysis as a method for high-speed elimination of noise in speech input to mobile terminals. The effectiveness of the proposed method is confirmed by evaluation experiments that reproduce an actual mobile environment.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1979
ISSN: 0001-4966
DOI: 10.1121/1.383408