US3111186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic measurement of reverberation time
Assignee: AT&T Inc
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Filing: 1959-07-17
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Granted: 1963-11-19
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Expires: 1979-07-17
Abstract
No abstract record available.
Inventors
- 👤 Manfred R Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:58
CPC Classifications
G; G01; G01H; G01H7/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
56 words
THE METHOD OF DETERMINING THE REVERBERATION TIME OF A CHAMBER WHICH COMPRISES THE STEPS OF GENERATING IN SAID CHAMBER AN ACOUSTIC WAVE WHOSE ENERGY VARIES AS A FUNCTION OF TIME AND MEASURING THE MEAN INCREASE OF PHASE LAG PER CYCLE PER SECOND OF THE RESULTING WAVE IN PROPAGATING FROM ONE POINT TO ANOTHER IN SAID CHAMBER.
Claim 2
Independent Claim
56 words
THE METHOD OF DETERMINING THE REVERBERATION TIME OF A CHAMBER WHICH COMPRISES THE STEPS OF GENERATING IN SAID CHAMBER AN ACOUSTIC WAVE WHOSE ENERGY VARIES AS A FUNCTION OF TIME AND MEASURING THE MEAN INCREASE OF PHASE LAG PER CYCLE PER SECOND OF THE RESULTING WAVE IN PROPAGATING FROM ONE POINT TO ANOTHER IN SAID CHAMBER.
Claim 3
Dependent Claim
151 words
APPARATUS FOR MEASURING THE REVERBERATION TIME OF A FIELD WHICH COMPRISES IN COMBINATION WITH A SOURCE OF ELECTRICAL OSCILLATIONS, MEANS COUPLED TO SAID SOURCE OF VARYING THE FREQUENCY OF SAID OSCILLATIONS FROM A FIRST FREQUENCY TO A SECOND FREQUENCY, TRANSDUCER MEANS COUPLED TO SAID SOURCE AND ENERGIZED THEREBY FOR INTRODUCING SOUND ENERGY IN SAID FIELD, DETECTOR MEANS POSITIONED WITHIN SAID FIELD FOR TRANSLATING SAID SOUND ENERGY INTO ALTERNATING ELECTRICAL CURRENTS, MEANS COUPLED TO SAID SOURCE OF ELECTRICAL OSCILLATIONS AND TO SAID DETECTOR MEANS FOR PRODUCING AN ELECTRICAL SIGNAL PROPORTIONAL TO THE NUMBER OF PHASE COINCIDENCES OCCURRING BETWEEN SAID OSCILLATIONS AND SAID CURRENTS, AND MEANS COUPLED TO SAID MEASURING MEANS AND ENERGIZED THEREBY FOR PRODUCING AN OUTPUT SIGNAL PROPORTIONAL TO THE PRODUCT OF SAID ELECTRICAL SIGNAL PRODUCED BY SAID MEASURING MEANS AND A CONSTANT THAT IS RELATED INVERSELY TO THE DIFFERENCE IN CYCLES PER SECOND BETWEEN SAID FIRST AND SAID SECOND FREQUENCIES.
Claim 4
Dependent Claim
151 words
APPARATUS FOR MEASURING THE REVERBERATION TIME OF A FIELD WHICH COMPRISES IN COMBINATION WITH A SOURCE OF ELECTRICAL OSCILLATIONS, MEANS COUPLED TO SAID SOURCE OF VARYING THE FREQUENCY OF SAID OSCILLATIONS FROM A FIRST FREQUENCY TO A SECOND FREQUENCY, TRANSDUCER MEANS COUPLED TO SAID SOURCE AND ENERGIZED THEREBY FOR INTRODUCING SOUND ENERGY IN SAID FIELD, DETECTOR MEANS POSITIONED WITHIN SAID FIELD FOR TRANSLATING SAID SOUND ENERGY INTO ALTERNATING ELECTRICAL CURRENTS, MEANS COUPLED TO SAID SOURCE OF ELECTRICAL OSCILLATIONS AND TO SAID DETECTOR MEANS FOR PRODUCING AN ELECTRICAL SIGNAL PROPORTIONAL TO THE NUMBER OF PHASE COINCIDENCES OCCURRING BETWEEN SAID OSCILLATIONS AND SAID CURRENTS, AND MEANS COUPLED TO SAID MEASURING MEANS AND ENERGIZED THEREBY FOR PRODUCING AN OUTPUT SIGNAL PROPORTIONAL TO THE PRODUCT OF SAID ELECTRICAL SIGNAL PRODUCED BY SAID MEASURING MEANS AND A CONSTANT THAT IS RELATED INVERSELY TO THE DIFFERENCE IN CYCLES PER SECOND BETWEEN SAID FIRST AND SAID SECOND FREQUENCIES.
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) | 1966-11-18 | 1967-05-20 | 1967-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-18 | 1971-05-20 | 1971-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-18 | 1975-05-20 | 1975-11-19 | $7700.00 | Window Closed / Lapsed |