US4463453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic intensity measurement apparatus and method including probe having ambient noise shield
Assignee: Boeing Co
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Filing: 1981-12-22
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Granted: 1984-07-31
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Expires: 2001-12-22
Abstract
Abstract Acoustic intensity measuring apparatus for determining sound energy intensity utilizing a probe having a pair of microphones and an associated ambient noise shield.
Inventors
- 👤 Robert L. Cohen
- 👤 Geir A. Dalan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:54
CPC Classifications
G; G01; G01H; G01H3/00; G01H3/10; G01H3/12; Y; Y10; Y10S; Y10S367/00; Y10S367/91
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
47 words
An acoustic intensity probe comprising in combination: an outer housing having an open end, said housing having a central axis and a sound absorbing chamber within said outer housing; and, a pair of microphones disposed along said central axis at the open end of said outer housing.
Claim 2
Dependent Claim
47 words
An acoustic intensity probe comprising in combination: an outer housing having an open end, said housing having a central axis and a sound absorbing chamber within said outer housing; and, a pair of microphones disposed along said central axis at the open end of said outer housing.
Claim 3
Dependent Claim
44 words
In an acoustical testing apparatus, a probe including: a pair of microphones; and an acoustic intensity probe ambient noise shield enclosing said pair of microphones so that the dipole directivity of said probe attenuates the tangential component of sound radiation from a radiating source.
Claim 4
Dependent Claim
44 words
In an acoustical testing apparatus, a probe including: a pair of microphones; and an acoustic intensity probe ambient noise shield enclosing said pair of microphones so that the dipole directivity of said probe attenuates the tangential component of sound radiation from a radiating source.
Claim 5
Dependent Claim
63 words
In the method of measuring sound intensity from a noise source: disposing a pair of microphones along the central axis of an open ended housing; disposing the open end of said open ended housing a predetermined distance from a flat radiating surface; and then, coupling said microphone pair to a digital Fourier analyzer for measuring the sound intensity from said flat radiating surface.
Claim 6
Dependent Claim
63 words
In the method of measuring sound intensity from a noise source: disposing a pair of microphones along the central axis of an open ended housing; disposing the open end of said open ended housing a predetermined distance from a flat radiating surface; and then, coupling said microphone pair to a digital Fourier analyzer for measuring the sound intensity from said flat radiating surface.
Claim 7
Independent Claim
56 words
The method of measuring sound intensity from a flat-shaped panel noise source which includes the step of disposing a two-microphone housing a predetermined distance from said flat-shaped panel noise source so that sound leakage entering said two-microphone housing approaches a two-microphone pair disposed along a central axis of said two-microphone housing at a substantially tangential angle.
Claim 8
Independent Claim
56 words
The method of measuring sound intensity from a flat-shaped panel noise source which includes the step of disposing a two-microphone housing a predetermined distance from said flat-shaped panel noise source so that sound leakage entering said two-microphone housing approaches a two-microphone pair disposed along a central axis of said two-microphone housing at a substantially tangential angle.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |