30
6.5 Octave band filters
Frequency evaluation system Base 10
Reference attenuation 0 dB
Margin of frequencies for real time operation 31,5 Hz a 16 kHz
Octave band central frequencies
Nominal central frequency Exact central frequency
63 Hz 63,096 Hz
125 Hz 125,89 Hz
250 Hz 251,19 Hz
500 Hz 501,19 Hz
1 kHz 1.000 Hz
2 kHz 1.995,3 Hz
4 kHz 2.511,9 Hz
8 kHz 7.943,3 Hz
6.6 Microphone
P007
Prepolarised ½” condenser microphone with preamplifier incorporated
Nominal sensitivity (typical) 11,2 mV/Pa
Length of cable 1 m
Constant pressure to free field correction
Frequency (Hz) Correction (dB) Frequency (Hz) Correction (dB)
63 0.5 1.000 0.1
125 0.0 2.000 0.4
250 0.1 4.000 1.3
500 0.0 8.000 4.1
Typical frequency response
Frequency
(Hz)
Relative response
(dB)
Frequency
(Hz)
Relative response
(dB)
63 1.3 1.000 0.0
125 0.5 2.000 0.0
250 0.3 4.000 0.4
500 0.1 8.000 0.4
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