otometrics Madsen Xeta, Reference Manual

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15 Technical specifications
15.1 MADSEN Xeta
Type identification
MADSEN Xeta is type 1067 from Natus Medical Denmark ApS.
Channels
2 separate and identical channels
Pure tone frequencies
AC: 11 standard 125 - 8000 Hz
BC: 250 - 8000 Hz standard frequencies
Insert phones 125 - 8000 Hz standard frequencies
Accuracy: Better than 1 %.
Modulation
FM (Warble): 1 - 20 Hz in 1 Hz steps. Mod. width 1% - 25% in 1% steps
AM for SISI: 5, 4, 3, 1, 0.75, 0.50, 0.25 dB HL steps
Attenuator
5 dB HL step resolution over the entire range
Attenuator accuracy
In whole range: better than 3 dB HL
Between two consecutive attenuator positions:
5 dB HL step: better than 1 dB HL
HL Range
Maximum output will be limited by the transducer.
AC: -10 to 120 dB HL at mid-frequencies
BC: -10 to 70 dB HL at mid-frequencies
Masking
Narrow band noise
Total harmonic distortion
Air < 2.5 %
Bone < 5 %
Otometrics - MADSEN Xeta 95