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Time domain wave separation using multiple microphones
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10.1121/1.3392441
/content/asa/journal/jasa/128/1/10.1121/1.3392441
http://aip.metastore.ingenta.com/content/asa/journal/jasa/128/1/10.1121/1.3392441
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Multiple microphone wave separation apparatus.

Image of FIG. 2.
FIG. 2.

System impulse response measurements for microphones separated by 12.5 cm.

Image of FIG. 3.
FIG. 3.

Transfer functions for frequency domain deconvolution, LMS, and TSVD shown in the time domain and frequency domains.

Image of FIG. 4.
FIG. 4.

Time domain transfer functions for microphones.

Image of FIG. 5.
FIG. 5.

Flow diagram representation of the two microphone time domain wave separation algorithm.

Image of FIG. 6.
FIG. 6.

Flow diagram representation of the microphone time domain wave separation algorithm. The forward going wave at each microphone is found by taking the median of the corresponding column vector from the matrix . Time domain convolution operations are used to calculate as defined in Fig. 7.

Image of FIG. 7.
FIG. 7.

Flow diagram representation of the microphone time domain wave separation algorithm. Only those time domain convolution operations involved in calculating the incoming waves at microphone are shown. In general the matrix will have dimension with all entries recalculated at each time step.

Image of FIG. 8.
FIG. 8.

Wave separation for microphones with and .

Image of FIG. 9.
FIG. 9.

Input impedance of an open ended cylindrical tube of length 149.1 cm.

Image of FIG. 10.
FIG. 10.

Magnitude of the reflectance of a cylindrical tube of length 149.1 cm, closed at the end, for two and three microphone time domain wave separation.

Image of FIG. 11.
FIG. 11.

Magnitude of the reflectance of an open ended cylindrical tube of length 149.1 cm for two microphone wave separation in the frequency domain (TM2C) and time domain (TDWS).

Image of FIG. 12.
FIG. 12.

Bore reconstruction of No. 10 leadpipe by Smith Watkins calculated from a three microphone measurement. Also shown are the diameter of the mandrel used in manufacture, the external profile of the crook, and internal exit diameter measured with calipers.

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/content/asa/journal/jasa/128/1/10.1121/1.3392441
2010-07-16
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Time domain wave separation using multiple microphones
http://aip.metastore.ingenta.com/content/asa/journal/jasa/128/1/10.1121/1.3392441
10.1121/1.3392441
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