Patent US3270833A successfully refreshed from Google Patents.
US3270833A
Expired / Lapsed
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⏱️ 0.0 years remaining
Method of and apparatus for measuring ensemble averages and decay curves
Assignee: AT&T Inc
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Filing: 1964-12-10
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Granted: 1966-09-06
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Expires: 1984-12-10
Abstract
No abstract record available.
Inventors
- 👤 Manfred R Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:34
CPC Classifications
G; G01; G01H; G01H7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 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 INTRODUCING A SELECTED FREQUENCY SUB-BAND OF SAID IMPULSE INTO SAID ENCLOSURE AT A FIRST PREDERTERMINED POINT, MEANS FOR DETECTING AT A SECOND PREDETERMINED POINT WITHIN SAID ENCLOSURE THE SOUND RESULTING FROM SAID RADIATED IMPULSE TO DERIVE AN OUTPUT SIGNAL REPRESENTATIVE OF THE IMPULSE RESPONSIVE OF SAID ENCLOSURE, MEANS FOR REVERSING THE DIRECTION OF SAID OUTPUT SIGNAL TO OBTAIN A REVERSED DIRECTION SIGNAL, MEANS FOR RAISING SAID REVERSED DIRECTION SIGNAL TO THE SECOND POWER TO PRODUCE A SQUARED SIGNAL, MEANS FOR INTEGRATING SAID SQUARED SIGNAL, THEREBY TO GENERATE A DECAY CURVE SIGNAL, AND MEANS FOR DERIVING A VISUAL RECORD FROM SAID DECAY CURVE SIGNAL.
Claim 2
Dependent Claim
136 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 INTRODUCING A SELECTED FREQUENCY SUB-BAND OF SAID IMPULSE INTO SAID ENCLOSURE AT A FIRST PREDERTERMINED POINT, MEANS FOR DETECTING AT A SECOND PREDETERMINED POINT WITHIN SAID ENCLOSURE THE SOUND RESULTING FROM SAID RADIATED IMPULSE TO DERIVE AN OUTPUT SIGNAL REPRESENTATIVE OF THE IMPULSE RESPONSIVE OF SAID ENCLOSURE, MEANS FOR REVERSING THE DIRECTION OF SAID OUTPUT SIGNAL TO OBTAIN A REVERSED DIRECTION SIGNAL, MEANS FOR RAISING SAID REVERSED DIRECTION SIGNAL TO THE SECOND POWER TO PRODUCE A SQUARED SIGNAL, MEANS FOR INTEGRATING SAID SQUARED SIGNAL, THEREBY TO GENERATE A DECAY CURVE SIGNAL, AND MEANS FOR DERIVING A VISUAL RECORD FROM SAID DECAY CURVE SIGNAL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |