Patent US3696206A successfully refreshed from Google Patents.
US3696206A
Expired / Lapsed
US
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Audio dosimeter
Assignee: EIDP Inc
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Filing: 1970-11-27
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Granted: 1972-10-03
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Expires: 1990-11-27
Abstract
Abstract An audio dosimeter for individual use determining exposure to sound energy as a function of both frequency and pressure level, with integration over the time of exposure and incorporating storage means preserving a quantitative measure of the exposure.
Inventors
- 👤 Edward S Ida
- 👤 Alfred Lechner
- 👤 James L Parsons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:55
CPC Classifications
G; G01; G01H; G01H3/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
184 words
An audio dosimeter for individual use comprising, in series circuit in the order recited, electronic microphonic sound sensor means, a high impedance first operational amplifier receiving the A-C voltage output of said sound sensor means, and ''''A'''' weighting network receiving the A-C voltage output constituting a measure of the ambient sound energy magnitude from said high impedance first operational amplifier and shaping it to conform to a preselected frequency attenuation pattern incorporating in said A-C voltage signal the otolaryngologically (and psychologically) harmful contribution of ambient sound frequency, a second operational amplifier effecting a preselected gain and final high frequency attenuation of said A-C voltage signal, a full-wave rectifier provided with diodes having a preselected threshold conductance effecting a limiting low voltage level signal input, each output side of said rectifier having a resistor in series connection therewith, a capacitor having a capacitance effecting substantial peak-storing action connected in shunt with respect to said rectifier and said resistorS, and an electrochemical integrating cell in shunt connection with said capacitor measuring sound exposure in terms of sound pressure with weighted frequency and time of exposure conjointly.
Claim 2
Dependent Claim
184 words
An audio dosimeter for individual use comprising, in series circuit in the order recited, electronic microphonic sound sensor means, a high impedance first operational amplifier receiving the A-C voltage output of said sound sensor means, and ''''A'''' weighting network receiving the A-C voltage output constituting a measure of the ambient sound energy magnitude from said high impedance first operational amplifier and shaping it to conform to a preselected frequency attenuation pattern incorporating in said A-C voltage signal the otolaryngologically (and psychologically) harmful contribution of ambient sound frequency, a second operational amplifier effecting a preselected gain and final high frequency attenuation of said A-C voltage signal, a full-wave rectifier provided with diodes having a preselected threshold conductance effecting a limiting low voltage level signal input, each output side of said rectifier having a resistor in series connection therewith, a capacitor having a capacitance effecting substantial peak-storing action connected in shunt with respect to said rectifier and said resistorS, and an electrochemical integrating cell in shunt connection with said capacitor measuring sound exposure in terms of sound pressure with weighted frequency and time of exposure conjointly.
Claim 3
Dependent Claim
44 words
An audio dosimeter for individual use according to claim 1 wherein said rectifier comprises a pair of oppositely connected diodes and said capacitor comprises a pair of series-connected peak-storing capacitor units of substantially equal capacitance having adjoining elements thereof connected to common potential reference.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |