Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1992-07-08
1994-11-15
Mullen, Thomas
Communications: electrical
Condition responsive indicating system
Specific condition
73646, 340529, 381 56, G08B 2300, H04R 2900
Patent
active
053652193
ABSTRACT:
A method and apparatus are provided for warning when the amplitude of conversations exceeds certain values. The apparatus includes a microphone and related circuitry which continuously produce a signal related to the amplitude of the conversation while the apparatus is operational. A comparator continuously compares the signal to a pre-set first value and produces an output as long as the signal indicates that the conversation exceeds a certain amplitude. There is a discriminator responsive to the comparator output which provides a discriminator output when the duration of the comparator output exceeds a pre-determined value. The discriminator is connected to an alarm which produces a warning signal when the discriminator provides the discriminator output. There may also be a second comparator which produces a visual signal when the amplitude of the conversation is above an amplitude which may be below the amplitude which activates the alarm.
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Chang Michael H.
Lee Robert
Wong Stanley
Cameron Norman M.
Chang Michael Hung
Mullen Thomas
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