BRUEL & KJAER HATS 4606, User Manual

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High-frequency Head and Torso Simulator (HF HATS) Type 5128 – User Manual 28
Fig.3.12 The sidetone characteristic of Type 5128-C for both an open and closed ear (100 Hz – 20 kHz)
Fig.3.13 Influence of ambient pressure on the transfer impedance of the ear simulator. The graph shows the transfer
impedance multiplied by the frequency relative to 500 Hz value
−100
−90
−80
−70
−60
−50
−40
−30
−20
−10
0
100 1000 10 000
Frequency (Hz)
990225/1
dB
Sidetone Open Ear Sidetone Closed Ear
−10
−5
0
5
10
15
20
25
30
35
40
20 200 2000 20 000
dB
Frequency (Hz)
1013 mBar
180180
500 mBar