Specifications

3
Model 140 Sound Analyzer
DISPLAY
Brilliant LED display gives a graphic point by point
readout. Clearly readable from a distance.
FILTERS
27 double tuned 1/3 octave filters on I.S.O. standard
centers from 40 Hz to 16 kHz. Filters double tuned
for greater selectivity and rejection of out-of-band
noise.
BROAD-BAND READOUT
Separate display of true dB-SPL from 40 Hz to
16 kHz.
SENSITIVITY
Microphone input to accommodate a standard
dynamic microphone.. Can be calibrated to
individual microphones to read Sound Pressure
Level in dB.
NOISE GENERATOR
Built-in Pink Noise Generator of the digital type with
special shaping for flat (pink) response from 40 Hz to
16 kHz.
SIZE
3-1/2 inch by 19 inch standard rack panel. Supplied
in wood grained carrying case for portability.
Optionally available without case and with dust
shrouds for fixed installation.
OPTION
Microphone Multiplexer averages input from three
microphones. Unit is self-contained, designed for
remote operation, and stores neatly in the Model
140's carrying case.
APPLICATIONS
The Model 140 has many applications as a REAL
TIME SPECTRUM ANALYZER in the audio
frequency range.
SOUND REINFORCEMENT SYSTEMS
EQUALIZATION
Real time analysis of the room-sound system allows
rapid, accurate equalization to the desired response.
NOISE MASKING
40 dB-SPL sensitivity allows proper adjustment of
noise generator-filter sets to give specified response
for masking or speech privacy. Double tuned filters
necessary for resolution of steep roll-offs required
are provided.
NOISE TRANSMISSION ANALYSIS
Comparative spectrum analysis of noise
transmission can be made quickly.
PROGRAM MONITOR
The Model 140 monitors both absolute overall level
as well as levels in each 1/3 octave channel.
Program spectral content can be determined at a
glance.
SYSTEMS CHECK-OUT
Recording and playback systems can be checked
via internal pink noise generator.
REMOTE DISPLAY
Sync and log amplifier outputs are available from the
back of the Model 140 for remote display on
oscilloscope. Line level input and noise output also
available on rear chassis to facilitate rack mounting
in permanent installations.