US3343627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for and method of determining the acoustic properties of an enclosure
Assignee: AT&T Inc
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Filing: 1966-03-16
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Granted: 1967-09-26
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Expires: 1986-03-16
Abstract
No abstract record available.
Inventors
- 👤 Manfred R Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:06
CPC Classifications
G; G01; G01H; G01H7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
APPARATUS FOR MEASURING AUTOMATICALLY THE SOUND DECAY CHARACTERISTIC OF AN ENCLOSURE WHICH COMPRISES: A SOURCE OF AN IMPULSE OF ENERGY HAVING A PREDETERMINED FREQUENCY RANGE AND A RELATIVELY SHORT TIME DURATION, MEANS FOR EXCITING SAID ENCLOSURE WITH SAID IMPLUSE OF ENERGY AT A FIRST PREDETERMINED POINT, MEANS FOR DETECTING AT A SECOND PREDETERMINED POINT WITHIN SAID ENCLOSUR AN OUTPUT SIGNAL REPRESENTATIVE OF THE IMPULSE RESPONSE OF SAID ENCLOSURE, MEANS FOR SELECTIVELY PROCESSING SAID OUTPUT SIGNAL, MEANS FOR DEVELOPING A SIGNAL WHICH IS THE CONTINUOUS INTEGRAL OF SAID PROCESSED SIGNAL, MEANS FOR DELAYING SAID INTEGRATED SIGNAL FOR A PREDETERMINED INTERVAL OF TIME, MEANS FOR DEVELOPING A SIGNAL PROPORTIONAL TO THE DIFFERENCE BETWEEN THE CONTINUOUS INTEGRAL OF SAID PROCESSED SIGNAL AND SAID DELAYED INTEGRATED SIGNAL, AND MEANS RESPONSIVE TO SAID DIFFERENCE SIGNAL FOR DEVELOPING AN INDICATION REPRESENTATIVE OF THE DECAY CHARACTERISTIC OF SAID ENCLOSURE.
Claim 2
Dependent Claim
142 words
APPARATUS FOR MEASURING AUTOMATICALLY THE SOUND DECAY CHARACTERISTIC OF AN ENCLOSURE WHICH COMPRISES: A SOURCE OF AN IMPULSE OF ENERGY HAVING A PREDETERMINED FREQUENCY RANGE AND A RELATIVELY SHORT TIME DURATION, MEANS FOR EXCITING SAID ENCLOSURE WITH SAID IMPLUSE OF ENERGY AT A FIRST PREDETERMINED POINT, MEANS FOR DETECTING AT A SECOND PREDETERMINED POINT WITHIN SAID ENCLOSUR AN OUTPUT SIGNAL REPRESENTATIVE OF THE IMPULSE RESPONSE OF SAID ENCLOSURE, MEANS FOR SELECTIVELY PROCESSING SAID OUTPUT SIGNAL, MEANS FOR DEVELOPING A SIGNAL WHICH IS THE CONTINUOUS INTEGRAL OF SAID PROCESSED SIGNAL, MEANS FOR DELAYING SAID INTEGRATED SIGNAL FOR A PREDETERMINED INTERVAL OF TIME, MEANS FOR DEVELOPING A SIGNAL PROPORTIONAL TO THE DIFFERENCE BETWEEN THE CONTINUOUS INTEGRAL OF SAID PROCESSED SIGNAL AND SAID DELAYED INTEGRATED SIGNAL, AND MEANS RESPONSIVE TO SAID DIFFERENCE SIGNAL FOR DEVELOPING AN INDICATION REPRESENTATIVE OF THE DECAY CHARACTERISTIC OF SAID ENCLOSURE.
References Cited (Backward Citations)
US3270833A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |