Time-selective windowing technique in free-field microphone reciprocity calibration

2013 ◽  
Vol 134 (1) ◽  
pp. 237-245 ◽  
Author(s):  
Hyu-Sang Kwon ◽  
Wan-Ho Cho ◽  
Sang-Joon Suh
Keyword(s):  
Free Field ◽  
Reciprocity Calibration ◽  
Windowing Technique

Free Field Reciprocity Calibration in a Convergent Spherical Acoustic Wave of a Focusing Transducer

2002 ◽  
Vol 19 (8) ◽  
pp. 1131-1134 ◽  
Author(s):  
Shou Wen-De ◽  
Yan Jia-Yong ◽  
Wang Hong-Zhang ◽  
Qian De-Chu
Keyword(s):  
Acoustic Wave ◽  
Free Field ◽  
Reciprocity Calibration

scholarly journals A time-selective technique for free-field reciprocity calibration of condenser microphones

2003 ◽  
Vol 114 (3) ◽  
pp. 1467-1476 ◽  
Author(s):  
Salvador Barrera-Figueroa ◽  
Knud Rasmussen ◽  
Finn Jacobsen
Keyword(s):  
Free Field ◽  
Reciprocity Calibration ◽  
Selective Technique

Free‐field reciprocity calibration of microphones in ultrasonic frequency range

2005 ◽  
Vol 118 (3) ◽  
pp. 1944-1945
Author(s):  
Nourreddine Bouaoua ◽  
Thomas Fedtke ◽  
Volker Mellert
Keyword(s):  
Free Field ◽  
Ultrasonic Frequency ◽  
Frequency Range ◽  
Reciprocity Calibration

Electrical cross-talk subtraction for free-field reciprocity calibration of half-inch laboratory standard microphones

2017 ◽  
Vol 141 (5) ◽  
pp. 3132-3136 ◽  
Author(s):  
Thiago Antônio B. Milhomem ◽  
Zemar M. Defilippo Soares ◽  
Ricardo E. Musafir ◽  
Swen Müller
Keyword(s):  
Cross Talk ◽  
Free Field ◽  
Reciprocity Calibration

Frequency Windowing Technique for Reducing Multi-Path Noise in Free-Field Reciprocity Microphone Calibration Method

2006 ◽  
Vol 321-323 ◽  
pp. 1245-1248 ◽  
Author(s):  
Hyuck Sang Kwon ◽  
Sang Joon Suh ◽  
Jae Gap Suh
Keyword(s):  
Free Field ◽  
Calibration Method ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Field Calibration ◽  
Enhanced Sensitivity ◽  
Sensitivity Evaluation ◽  
Low Pass ◽  
Inherent Problem ◽  
Windowing Technique

The sensitivity of the microphone is determined absolutely by primary calibration technique based on the reciprocity principle. The free-field calibration has the inherent problem due to the weak signal received in the microphone. Multi-path noises such as cross-talk and reflections corrupt the received signal, and thus the sensitivity evaluation is poor. The time selective method has been widely used as the useful tool to get rid of such noises. However FFT based signal processing invokes unwanted processing error such as leakage. A well designed frequency window which would be a kind of low-pass filter would reduce the leakage problem, and it helps to separate multi-path noises from the directly propagated signal well. The result well shows the advantages in separating the noises and the availability in the free-field calibration with the enhanced sensitivity evaluation.

Sign in / Sign up

Export Citation Format

Share Document