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Acoustic standing wave suppression using randomized phase-shift-keying excitations
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10.1121/1.3203935
/content/asa/journal/jasa/126/4/10.1121/1.3203935
http://aip.metastore.ingenta.com/content/asa/journal/jasa/126/4/10.1121/1.3203935

Figures

Image of FIG. 1.
FIG. 1.

A block diagram of the randomized PSK signal generator.

Image of FIG. 2.
FIG. 2.

Representative random BPSK and random QPSK signals with time segment of 10 signal cycles. The phase angles are relative to the carrier signal.

Image of FIG. 3.
FIG. 3.

An experimental setup for the acoustic field scan.

Image of FIG. 4.
FIG. 4.

Normalized square of the acoustic field pressure along the transmitting transducer axis of symmetry with sinusoidal excitation (no PSK) and excitations with random and sequential BPSK and QPSK.

Image of FIG. 5.
FIG. 5.

Normalized square of the acoustic field pressure on the plane : (a) sinusoidal CW (no PSK), (b) sequential BPSK, (c) random BPSK, (d) sequential QPSK, and (e) random QPSK.

Tables

Generic image for table
TABLE I.

Standing wave effect with different excitations quantified in terms of the value which is defined as the comparison of the peak, , over a region with the average amplitude of as described in Eq. (1).

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/content/asa/journal/jasa/126/4/10.1121/1.3203935
2009-10-01
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Acoustic standing wave suppression using randomized phase-shift-keying excitations
http://aip.metastore.ingenta.com/content/asa/journal/jasa/126/4/10.1121/1.3203935
10.1121/1.3203935
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