US4225955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin disk acoustic baffle system
Assignee: United States Department of the Navy
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Filing: 1978-12-07
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Granted: 1980-09-30
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Expires: 1998-12-07
Abstract
Abstract A thin disk acoustic baffle comprising a thin disk of material having a uue combination of acoustical properties and dimensions to provide optimum attenuation of sound transmission between two points. Optimum sound attenuation is achieved by adjusting the thickness, diameter, and location of the thin disk relative to one of the points to be baffled and by selecting the material of the disk to have acoustic properties such that sound waves diffracted around the edges of the disk cancel the direct waves transmitted through the disk at a particular frequency of interest.
Inventors
- 👤 Michael L. Barlow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:56
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/16; G10K11/175; G10K11/002
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
96 words
The method of reducing or preventing the reception of acoustic waves in a single given direction at a specific frequency by an acoustic receiver by interposing a thin circular solid disk between said receiver and the source of said acoustic waves where the diameter, the thickness, the material, and the location relative to the receiver of said disk have been selected to be in the proper relationships with each other to achieve a condition whereby the acoustic waves diffracted around said disk cancel the direct waves transmitted through said disk at the location of said receiver.
Claim 2
Independent Claim
96 words
The method of reducing or preventing the reception of acoustic waves in a single given direction at a specific frequency by an acoustic receiver by interposing a thin circular solid disk between said receiver and the source of said acoustic waves where the diameter, the thickness, the material, and the location relative to the receiver of said disk have been selected to be in the proper relationships with each other to achieve a condition whereby the acoustic waves diffracted around said disk cancel the direct waves transmitted through said disk at the location of said receiver.
Claim 3
Dependent Claim
63 words
A thin disk acoustic baffle system for isolating a receiver in sea water from a waveform having a frequency of 25 KHz comprising: (a) a thin disk having a diameter of about 12 inches, a thickness of about 0.063 inches and made of lead; and (b) said receiver positioned along the center axis of said disk and about 6 inches behind said disk.
Claim 4
Dependent Claim
63 words
A thin disk acoustic baffle system for isolating a receiver in sea water from a waveform having a frequency of 25 KHz comprising: (a) a thin disk having a diameter of about 12 inches, a thickness of about 0.063 inches and made of lead; and (b) said receiver positioned along the center axis of said disk and about 6 inches behind said disk.
References Cited (Backward Citations)
US2457527A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-30 | 1984-03-31 | 1984-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-30 | 1988-03-31 | 1988-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-30 | 1992-03-31 | 1992-09-30 | $7700.00 | Window Closed / Lapsed |