Description
A portable filter set containing 11 passive band-pass filter
for octave analysis. It is primarily designed for use with the Precision
Sound Level Meter.
Frequency Range | 22 Hz - 45 Hz covered by 11 octave filters |
---|---|
Centre Frequencies | 31.5, 63, 125, 250, 500, 1000, 2000, 4000, 8000, 16000 and 31500 Hz |
Pass-bad Uniformity | ± 0.5 dB |
Attenuation | |
At the band edge (1/2 octave from centre frequency) | 3 ± 1 dB |
One octave from centre frequency | 25 dB |
Two octaves from centre frequency | 50 dB |
Max Input Voltage | 1 Volt rms |
Max Source Impedance | 25 ohms |
Load Impedance | 146 kohms, 40-60 pF |
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