Interacoustics AD528 - Page 37

D-0121151-B – 2018/11
AD528 - Instructions for Use - EN Page 33
Free field
Power amplifier and loudspeakers
With an input of 7 Vrms - Amplifier and loudspeakers must be able to create a Sound
Pressure Level of 100 dB in a distance of 1 meter - and meet the following
requirements:
Frequency Response
Total Harmonic Distortion
125-250 Hz
+0/-10 dB
80 dB SPL < 3%
250-4000 Hz
±3 dB
100 dB SPL < 10%
4000-6300 Hz
±5 dB
Internal storage
50.000 sessions (500 clients, 100 sessions/client)
Signal Indicator
(VU)
Time weighting: 300 mS
Dynamic range: 23 dB
Rectifier characteristics: RMS
Selectable inputs are provide with an attenuator by which the level can be adjusted to
the indicator reference position (0 dB).