US3156316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for automatically measuring sound transmission characteristics of a room
Assignee: AT&T Inc
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Filing: 1960-11-01
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Granted: 1964-11-10
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Expires: 1980-11-01
Abstract
No abstract record available.
Inventors
- 👤 Harold L Barney
- 👤 Mark B Gardner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:19
CPC Classifications
G; G01; G01H; G01H7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
APPARATUS FOR COMPUTING AUTOMATICALLY THE FREQUENCY IRREGULARITY BETWEEN TWO ARBITRARILY SELECTED POINTS IN A ROOM WHICH COMPRISES A SOURCE OF A SOUND WAVE LOCATED AT ONE OF SAID POINTS, MEANS FOR SELECTIVELY VARYING THE FREQUENCY OF SAID SOUND WAVE DURING A PREDETERMINED TIME INTERVAL, MEANS RESPONSIVE TO SAID SOUND WAVE FOR DERIVING AN ELECTRICAL WAVE REPRESENTATIVE OF THE LOGARITHM OF SOUND PRESSURE FLUCTUATIONS AT THE SECOND OF SAID LOGARITHM DUE TO SAID SOUND WAVE, MEANS SUPPLIED WITH SAID ELECTRICAL WAVE FOR DERIVING FROM SUCCESSIVE MAXIMUM AND MINMUM AMPLITUDES OF SAID ELECTRICAL WAVE A SUCCESSION OF
Claim 2
Dependent Claim
95 words
APPARATUS FOR COMPUTING AUTOMATICALLY THE FREQUENCY IRREGULARITY BETWEEN TWO ARBITRARILY SELECTED POINTS IN A ROOM WHICH COMPRISES A SOURCE OF A SOUND WAVE LOCATED AT ONE OF SAID POINTS, MEANS FOR SELECTIVELY VARYING THE FREQUENCY OF SAID SOUND WAVE DURING A PREDETERMINED TIME INTERVAL, MEANS RESPONSIVE TO SAID SOUND WAVE FOR DERIVING AN ELECTRICAL WAVE REPRESENTATIVE OF THE LOGARITHM OF SOUND PRESSURE FLUCTUATIONS AT THE SECOND OF SAID LOGARITHM DUE TO SAID SOUND WAVE, MEANS SUPPLIED WITH SAID ELECTRICAL WAVE FOR DERIVING FROM SUCCESSIVE MAXIMUM AND MINMUM AMPLITUDES OF SAID ELECTRICAL WAVE A SUCCESSION OF
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) | 1967-11-10 | 1968-05-11 | 1968-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-10 | 1972-05-11 | 1972-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-10 | 1976-05-11 | 1976-11-10 | $7700.00 | Window Closed / Lapsed |