Measuring and testing – Vibration – By mechanical waves
Reexamination Certificate
2007-01-17
2010-11-23
Saint Surin, J M (Department: 2856)
Measuring and testing
Vibration
By mechanical waves
C073S642000, C381S074000, C181S130000
Reexamination Certificate
active
07836770
ABSTRACT:
A noise dosimeter with capability to rapidly predict noise exposure over an extended time period based on a measurement of short duration. Either an acoustic or an electrical earphone adapter provides a convenient means to connect the noise dosimeter to an external sound source. A direct input jack operable to receive at least one audio signal provides a signal to an RMS detector, which provides a DC signal to a two-stage amplifier circuit. The outputs of the amplifiers are provided to a processor having multiple A/D channels. The processor calculates accumulated noise doses and drives a display, which in one embodiment includes a panel of light-emitting diodes. In one embodiment, the dosimeter includes functionality for control of external devices such as sound boards.
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Flamme Gregory A.
Goldberg Jack
Helmink Dana S.
Killion Mead C.
Etymotic Research Inc.
M Saint Surin J
McAndrews Held & Malloy Ltd.
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