BRUEL & KJAER 1618 - Page 5

types 1617 and 1618
Third-Octave and
Octave Band Pass Filters
GENERAL FEATURES:
• 41 third-octave filter
bands, centre frequencies
2 Hz to 20 kHz
• 41 overlapping octave
filter bands, centre
frequencies 2 Hz to 20 kHz
• Third-octave and octave
filters in accordance with
IEC 225 - 1966, DIN
45 651 and 45 652, and
ANSI S1.11-1966
• Digital display of selected
centre frequency and
bandwidth
• Built-in A-weighting
network
• Electronic control of filter
switching
• Manual or Level Recorder
controlled filter scanning
• Selectable scan start
position to save time,
eliminates low frequencies
when required
• Input overload warning
circuit
• Floating or grounded
signal input
11111 1 6 1 8
ADDITIONAL FEATURES
TYPE 1617:
• 9 third-octave filter bands,
centre frequencies 25 kHz
to 160 kHz
• Built-in B, C, D-weighting
networks
• Comprehensive connection
facilities for use with other
instruments
• Operation of front panel
controls via built-in IEC
Interface
• Selection and control of
averaging time program for
the measuring instrument
INN
USES:
(With suitable Measuring
Amplifiers)
• Third-octave and octave
frequency analysis of
sound and vibration
• Measurement of frequency
response
• Measurement of sound
transmission loss
im Measurement of vibration
isolation
• Testing acoustic materials
• Recording of spectrograms
with constant confidence
level (1617)
19-029