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Leakage effect in Helmholtz resonators
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10.1121/1.3183416
/content/asa/journal/jasa/126/3/10.1121/1.3183416
http://aip.metastore.ingenta.com/content/asa/journal/jasa/126/3/10.1121/1.3183416

Figures

Image of FIG. 1.
FIG. 1.

BEM model of a HR with leakage.

Image of FIG. 2.
FIG. 2.

Schematic of a plate with a single hole.

Image of FIG. 3.
FIG. 3.

Schematic of a two-microphone setup for acoustic impedance measurement of a hole.

Image of FIG. 4.
FIG. 4.

Picture of the prototype.

Image of FIG. 5.
FIG. 5.

Schematic of the baffle (unit in cm).

Image of FIG. 6.
FIG. 6.

Schematic of the prototype including HR with leakages (unit in cm).

Image of FIG. 7.
FIG. 7.

Experimental results for TL with the prototype (holes open).

Image of FIG. 8.
FIG. 8.

Experimental results for TL with the prototype (gaps open).

Image of FIG. 9.
FIG. 9.

Experimental results for TL with the prototype (varying hole and gap locations).

Image of FIG. 10.
FIG. 10.

Experimental results for TL with the prototype (holes and/or gaps fully open).

Image of FIG. 11.
FIG. 11.

Relationship between peak TL frequency and open area on the baffle; solid circle represents no leakage case.

Image of FIG. 12.
FIG. 12.

Relationship between peak TL magnitude and open area on the baffle; solid circle represents no leakage case.

Image of FIG. 13.
FIG. 13.

Measured acoustic impedance (resistance and reactance) of a hole.

Image of FIG. 14.
FIG. 14.

Comparison between experimental results and BEM predictions for leakage model (one hole open).

Image of FIG. 15.
FIG. 15.

Comparison between experimental results and BEM predictions for leakage model (two holes open).

Image of FIG. 16.
FIG. 16.

The schematic of HR with leakage for 1D analysis.

Tables

Generic image for table
TABLE I.

The hole openings from H1 to H13 (all gaps are closed).

Generic image for table
TABLE II.

The gap openings from G1 to G4 (all holes are closed).

Generic image for table
TABLE III.

Effect of location of hole and gap openings.

Generic image for table
TABLE IV.

The peak TL frequencies with hole opening.

Generic image for table
TABLE V.

The peak TL frequencies with gap opening.

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/content/asa/journal/jasa/126/3/10.1121/1.3183416
2009-09-01
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Leakage effect in Helmholtz resonators
http://aip.metastore.ingenta.com/content/asa/journal/jasa/126/3/10.1121/1.3183416
10.1121/1.3183416
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