Severity: Warning
Message: fopen(/var/lib/php/sessions/ci_sessionepki0srphek57tnbvvcgkorp1121vdaj): Failed to open stream: No space left on device
Filename: drivers/Session_files_driver.php
Line Number: 177
Backtrace:
File: /var/www/html/index.php
Line: 316
Function: require_once
Severity: Warning
Message: session_start(): Failed to read session data: user (path: /var/lib/php/sessions)
Filename: Session/Session.php
Line Number: 137
Backtrace:
File: /var/www/html/index.php
Line: 316
Function: require_once
1 results match your criteria: "Hunan Institute of Medical Device Testing[Affiliation]"
Zhongguo Yi Liao Qi Xie Za Zhi
March 2022
Hunan Institute of Medical Device Testing, Changsha, 410001.
This paper analyzes the shortcomings of the existing pure tone audiometers, and proposes a system to realize pure tone audiometry and speech audiometry with a new DSP processor. The pure tone test signal produced by the system has accurate frequency, high signal-to-noise ratio, and small harmonic distortion. The noise generator that comes with DSP adds a band-pass filter to realize the generation of narrow-band noise.
View Article and Find Full Text PDF