WIRELESS DIGITAL TRANSMISSION OF LOW FREQUENCY EFFECTS AND SURROUND CHANNELS FOR SURROUND SOUND SYSTEM

2013 ◽  
Vol 133 (6) ◽  
pp. 4353
Author(s):  
John Justin Caffrey
Keyword(s):  
Low Frequency ◽  
Digital Transmission ◽  
Sound System ◽  
Frequency Effects ◽  
Surround Sound

Real Ear Sound Pressure Levels Developed by Three Portable Stereo System Earphones

1992 ◽  
Vol 1 (4) ◽  
pp. 52-55 ◽  
Author(s):  
Gail L. MacLean ◽  
Andrew Stuart ◽  
Robert Stenstrom
Keyword(s):  
High Frequency ◽  
Sound Pressure ◽  
Low Frequency ◽  
Test System ◽  
Output Frequency ◽  
Frequency Effects ◽  
Adult Men ◽  
Frequency Responses ◽  
Significant Difference ◽  
Sound Pressure Levels

Differences in real ear sound pressure levels (SPLs) with three portable stereo system (PSS) earphones (supraaural [Sony Model MDR-44], semiaural [Sony Model MDR-A15L], and insert [Sony Model MDR-E225]) were investigated. Twelve adult men served as subjects. Frequency response, high frequency average (HFA) output, peak output, peak output frequency, and overall RMS output for each PSS earphone were obtained with a probe tube microphone system (Fonix 6500 Hearing Aid Test System). Results indicated a significant difference in mean RMS outputs with nonsignificant differences in mean HFA outputs, peak outputs, and peak output frequencies among PSS earphones. Differences in mean overall RMS outputs were attributed to differences in low-frequency effects that were observed among the frequency responses of the three PSS earphones. It is suggested that one cannot assume equivalent real ear SPLs, with equivalent inputs, among different styles of PSS earphones.

The driving frequency effects on the atmospheric pressure corona jet plasmas from low frequency to radio frequency

2011 ◽  
Vol 18 (4) ◽  
pp. 043503 ◽  
Author(s):  
Dan Bee Kim ◽  
H. Jung ◽  
B. Gweon ◽  
S. Y. Moon ◽  
J. K. Rhee ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Atmospheric Pressure ◽  
Low Frequency ◽  
Driving Frequency ◽  
Frequency Effects

Low Frequency Simulations for Ambisonics Auralization of a Car Sound System

2021 ◽  
Author(s):  
Daniel Pinardi ◽  
Angelo Farina ◽  
Jong-Suh Park
Keyword(s):  
Low Frequency ◽  
Sound System

The Frequency Effects on Fatigue Threshold of PVC-M and PVC-U in Air and Water Medium

2008 ◽  
Vol 41-42 ◽  
pp. 183-187
Author(s):  
N. Samat ◽  
Alan Whittle ◽  
Mark Hoffman
Keyword(s):  
Stress Ratio ◽  
Low Frequency ◽  
Threshold Value ◽  
Cyclic Fatigue ◽  
Fatigue Threshold ◽  
Water Medium ◽  
Chlorinated Polyethylene ◽  
Frequency Effects ◽  
Testing Environment ◽  
Impact Modifier

The cyclic fatigue threshold value (Kth) of PVC materials with (PVC-M) and without (PVC-U) impact modifier was determined and compared in air and water environments. The PVCM specimens contain 6 pphr of chlorinated polyethylene (CPE) impact modifier. The testing was undertaken at a stress ratio of R=0.1 and fatigue threshold was evaluated at 3 different frequencies: 1Hz, 7Hz and 20Hz. Frequency noticeably affected the fatigue threshold value; regardless of the testing environment; at low frequency the fatigue threshold of PVC-M was below PVC-U, however, this difference gradually decreased with increasing frequency as Kth of PVC-M increased but Kth of PVC-U remained constant. This trend was accelerated in water where a higher of fatigue threshold, Kth, was also observed. A lower fatigue threshold of PVC-M than PVC-U is associated with the presence of CPE particles. The absorption of water into the PVC matrix was evident with the formation of nodular structures observed on the fracture surface. The presence of the nodular structures (at regions close to the threshold) has retarded the fibrillation of crazes, which then blunted the crack propagation.

Low frequency effects of surface states on 4H-SiC metal-semiconductor field effect transistor

2003 ◽  
Vol 12 (4) ◽  
pp. 389-393
Author(s):  
Yang Lin-An ◽  
Yu Chun-Li ◽  
Zhang Yi-Men ◽  
Zhang Yu-Ming
Keyword(s):  
Field Effect ◽  
Field Effect Transistor ◽  
Low Frequency ◽  
Surface States ◽  
Frequency Effects ◽  
Effect Transistor
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