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US 5,473,729 AGranted
Critical incident recorder
OwnerDavid P. Bryant, Gene M. Nitschkeinventors
Life of this patent
Estimating the term…
Abstract
A portable, continuous loop, microchip recording device which stores sound prior to and for a preset period after a timer is triggered by either a manual switch, a preprogrammed acoustical signature, or when a preset decibel or pressure level is reached.
Claims2
A portable sound recording device comprising:
- a digital processor which receives sound through an analog input circuit and records the received sound digitally in a microchip memory in a loop fashion whereby the oldest sound is replaced with the latest received sound and compares the received sound to either a stored, decibel threshold level, or to a stored, preprogrammed acoustical signature to determine if a specific criteria has been satisfied and once the criteria has been satisfied, stops recording the received sound after a preset time has transpired thereby enabling the collection and storage of incoming sound both before and after the specified criteria is satisfied.
Dependencies are inferred from the claim text.