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Acoustic attenuator and method of attenuation of noise

a technology of attenuator and noise, which is applied in the field of sound reduction, can solve problems such as mechanically dissipating sound energy, and achieve the effect of dissipating sound energy and enabling vibration displacement of acoustic resonators

Inactive Publication Date: 2002-11-14
MONSON ROBERT JAMES +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The resonance cavity therein, which functions as a Helmholtz resonator, generates a standing resonance wave with the standing wave resulting in vibration displacement of the non-secured acoustic resonators thereby frictionally and mechanically dissipating the sound energy before it can emerge from the cabinet.

Method used

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  • Acoustic attenuator and method of attenuation of noise
  • Acoustic attenuator and method of attenuation of noise
  • Acoustic attenuator and method of attenuation of noise

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Embodiment Construction

[0011] FIG. 1 shows a perspective view of an equipment cabinet 10 having a front panel 11 and a side panel 12 which has been partially cutaway to reveal a hollowed out region 16 between top member 15 and bottom member 14. Located in the hollowed out region 16 is a plurality of bead like acoustic resonators 13. In the embodiment shown multiple acoustic resonators 13 are located in an integral pocket of the cabinet 10 with the cabinet holding equipment such as a motor or the like (not shown) that normally generates annoying if not harmful noise levels.

[0012] The present invention is well suited for applications such as ocean going ships where equipment is concentrated in certain areas of the ship and the overall noise level increases due to the noise from multiple sources. The use of a noise reduction cabinet of the present invention can be achieved without increased use of space as the noise attenuation can be achieved within the cabinets. The result is the equipment operators and cr...

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Abstract

A sound reducer or sound attenuator for use in cabinets and the like with the sound reducer comprising a plurality of small bead like acoustic resonators loosely held in position between two members with each of the acoustic resonators having an acoustical resonance cavity therein for generating a standing wave with the standing wave producing vibration displacement of the acoustic resonators thereby dissipating acoustical sound energy through mechanical work.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS, IF ANY[0001] Not applicableSTATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT[0002] Not applicable.REFERENCE TO A MICROFICHE APPENDIX, IF ANY[0003] Not applicable.FIELD OF THE INVENTION[0004] This invention relates generally to sound reduction and more particularly to reducing the internal noise from within a cabinet or the like by conversion of acoustical energy into mechanical or vibration energy.BACKGROUND OF THE INVENTION[0005] One of the difficulties with equipment and particularly with equipment confined in equipment cabinets is that the equipment generally generates noise within the cabinet which is often enhanced by vibration of the cabinet. In order to reduce the internal cabinet noise it is necessary to provide some type of acoustic damping. One of the ways of reducing unwanted sounds is to place materials that absorb the sound energy proximate the noise source. The present invention provides an improved method and appa...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G10K11/16
CPCG10K11/16
Inventor MONSON, ROBERT JAMESMCCOLLOUGH, TREVOR J.YAN, JIANHUA
Owner MONSON ROBERT JAMES