BRUEL & KJAER 2604 Instructions And Applications

Microphone Amplifier Type 2604
The instrument is designed for the amplification
and measurement of small a .c. voltages . The total
amp I ification is 100 dB. By means of a switch
the built-in rectifier and meter circuit can be
switched to measure either the arithmetic average,
the true r.m.s. or the peak value of the input
signal. The instrument also contains the inter-
nationally standardized weighting networks for
sound level measurements. Connections for Cond·
enser Microphone and Level Recorder.
Nrerum, Denmark .
~
80 05 00 .
~
BRUKJA, Copenhagen . Telex: 5316
88 2604