EARPHONE RECEIVER ATTENUATION MEASUREMENT TECHNIQUE
First Claim
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1. A method for measuring the sound attenuating effectiveness and seal fit of an earphone ear cover in a noise environment, comprising the steps of:
- a. using an earphone as a microphone to transmit the noise level within the ear cover, first, with the ear cover in place on the user, and second, with the ear cover removed;
b. measuring the output transmitted by the transducer in both instances, the difference between the outputs being the acoustic attenuation provided by the ear cover.
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Abstract
A system for measuring the effectiveness of the sound attenuating function of an earphone sound attenuation cover by employing the earphone transducer as a microphone and measuring the noise level with the ear cover in place on the user'"'"''"'"'s ear and with the cover removed, the difference in decibels being interpreted as the acoustic attenuation provided by the ear cover.
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Citations
3 Claims
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1. A method for measuring the sound attenuating effectiveness and seal fit of an earphone ear cover in a noise environment, comprising the steps of:
- a. using an earphone as a microphone to transmit the noise level within the ear cover, first, with the ear cover in place on the user, and second, with the ear cover removed;
b. measuring the output transmitted by the transducer in both instances, the difference between the outputs being the acoustic attenuation provided by the ear cover.
- a. using an earphone as a microphone to transmit the noise level within the ear cover, first, with the ear cover in place on the user, and second, with the ear cover removed;
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2. A method as in claim 1 wherein the effectiveness of the sound attenuating function of said ear cover is read-out directly in decibels on a sound level measuring means.
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3. A method as in claim 1 wherein said output level is measured by means responsive to select frequencies of the noise spectrum.
Specification
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Current AssigneeDouglas G. Robertson, Richard P. Tegt, Thomas V. Blattel
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Original AssigneeDouglas G. Robertson, Richard P. Tegt, Thomas V. Blattel
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InventorsTegt, Richard P., Robertson, Douglas G., Blattel, Thomas V.
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Primary Examiner(s)Claffy, Kathleen H.
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Assistant Examiner(s)Olms, Douglas W.
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Application NumberUS05/197,863Time in Patent Office530 DaysField of Search179/1P,1C,2C,175.1A,175 181/.5APUS Class Current381/58CPC Class CodesA61F 11/145 electric, e.g. for active n...H04R 1/1008 Earpieces of the supra-aura...H04R 29/00 Monitoring arrangements; Te...
