Akg Acoustics Gmbh

Akg Akustische U. Kino-Gerate Gesellschaft M.b.h.

Josef Wurzer

Konrad Wolf

Rupert Rohrb&ouml;ck

A method and apparatus for determining the remaining operating time of an appliance powered by batteries or accumulators determine and indicate the remaining operating time by measuring and evaluating the battery voltage wherein an EEPROM is provided which stores the value of the battery voltage at the instant of switching off the appliance.

Method and apparatus for determining the remaining operating time of battery-powered appliances

A microphone arrangement comprising at least two individual microphones arranged closely next to each other, whose individual microphones depending on the recording angle desired for the sound recording are a pressure- and/or a pressure gradient receiver and/or a directional line microphone, is characterized by the wind pressure being continuously measured during the sound recording by means of a microphone (Mw) with downstream switched electronic circuit (5, 11, 12) and depending on the respectively prevailing wind pressure always that microphone (M1, M2, Mn) remains switched to the amplifier 9 assigned to it by an instantaneously controlled switch (6, 7, 8), which in its conversion principle, frequency course and its directional effect is least sensitive to wind noises for the prevailing wind intensity.

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Vienna, Austria

Josef Wurzer