The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 14, 2015
Filed:
Dec. 30, 2004
Antony M W. Bayley, Wooton Bassett, GB;
William R. Morrell, Santa Cruz, CA (US);
Iain J. Mcneill, Aptos, CA (US);
Kwangsee A. Woo, Scotts Valley, CA (US);
Antony M W. Bayley, Wooton Bassett, GB;
William R. Morrell, Santa Cruz, CA (US);
Iain J. McNeill, Aptos, CA (US);
Kwangsee A. Woo, Scotts Valley, CA (US);
Plantronics, Inc., Santa Cruz, CA (US);
Abstract
Sound pressure level limiter with anti-startle feature for audio systems are disclosed. The anti-startle feature may be implemented with a delta incident detector for detecting delta acoustic incidents that exceed a predetermined acoustic startle boundary, a delta limiter for determining an anti-startle gain, and an amplifier to apply the anti-startle gain to the input signal. The delta incident detector may detect delta incidents based on an estimated true SPL delivered by a transducer to a predetermined datum point. The estimated true SPL may be determined by based on a measured receiving frequency response of the transducer. An SPL limiter may also determine an SPL gain in response to detecting an SPL acoustic incident that exceeds a predetermined SPL threshold, and an amplifier may apply the SPL gain to the input signal to reduce it below the threshold.