US3346694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speech level measuring apparatus
Assignee: AT&T Inc
•
Filing: 1965-06-02
•
Granted: 1967-10-10
•
Expires: 1985-06-02
Abstract
No abstract record available.
Inventors
- 👤 Paul T Brady
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:43
CPC Classifications
G; G01; G01H; G01H3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
APPARATUS FOR AUTOMATICALLY OBTAINING A ONE-DIMENSIONAL MEASURE OF THE LEVEL OF A SPEECH SIGNAL ABOVE A SELECTED THRESHOLD, WHICH COMPRISES MEANS FOR GENERATING FROM SAID SPEECH SIGNAL A VARIABLE FREQUENCY SIGNAL WHEREIN SAID FREQUENCY IS PROPORTIONAL TO THE AMPLITUDE OF THE LOGARITHM OF THE LEVEL OF THE ENVELOPE OF A RECTIFIED VERSION OF SAID SPEECH SIGNAL, PROCESSING MEANS INCLUDING MEANS FOR INTEGRATING SAID VARIABLE FREQUENCY SIGNAL WITH RESPECT TO TIME WHENEVER THE LEVEL OF THE ENVELOPE OF SAID RECTIFIED VERSION OF SAID SPEECH SIGNAL EXCEEDS SAID SELECTED THRESHOLD AND MEANS FOR OBTAINING AN AVERAGE FREQUENCY WHICH IS PROPORTIONAL TO THE AVERAGE LOGARITHM OF THE LEVEL OF SAID ENVELOPE ABOVE SAID SELECTED THRESHOLD, AND MEANS FOR DERIVING FROM SAID AVERAGE FREQUENCY THE AVERAGE PEAK LEVEL OF THE ENVELOPE OF SAID RECTIFIED SPEECH SIGNAL OVER A PREDETERMINED TIME PERIOD, SAID AVERAGE PEAK LEVEL BEING INDEPENDENT OF THE THRESHOLD AND THUS BEING A ONE-DIMENSIONAL MEASURE OF THE LEVEL OF SAID SPEECH SIGNAL.
Claim 2
Dependent Claim
159 words
APPARATUS FOR AUTOMATICALLY OBTAINING A ONE-DIMENSIONAL MEASURE OF THE LEVEL OF A SPEECH SIGNAL ABOVE A SELECTED THRESHOLD, WHICH COMPRISES MEANS FOR GENERATING FROM SAID SPEECH SIGNAL A VARIABLE FREQUENCY SIGNAL WHEREIN SAID FREQUENCY IS PROPORTIONAL TO THE AMPLITUDE OF THE LOGARITHM OF THE LEVEL OF THE ENVELOPE OF A RECTIFIED VERSION OF SAID SPEECH SIGNAL, PROCESSING MEANS INCLUDING MEANS FOR INTEGRATING SAID VARIABLE FREQUENCY SIGNAL WITH RESPECT TO TIME WHENEVER THE LEVEL OF THE ENVELOPE OF SAID RECTIFIED VERSION OF SAID SPEECH SIGNAL EXCEEDS SAID SELECTED THRESHOLD AND MEANS FOR OBTAINING AN AVERAGE FREQUENCY WHICH IS PROPORTIONAL TO THE AVERAGE LOGARITHM OF THE LEVEL OF SAID ENVELOPE ABOVE SAID SELECTED THRESHOLD, AND MEANS FOR DERIVING FROM SAID AVERAGE FREQUENCY THE AVERAGE PEAK LEVEL OF THE ENVELOPE OF SAID RECTIFIED SPEECH SIGNAL OVER A PREDETERMINED TIME PERIOD, SAID AVERAGE PEAK LEVEL BEING INDEPENDENT OF THE THRESHOLD AND THUS BEING A ONE-DIMENSIONAL MEASURE OF THE LEVEL OF SAID SPEECH 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) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |