• Speech Weighted Noise
– AC and BC
– SF
Correlated
Non-correlated
A
• White Noise (Wide band
noise)
– AC and BC
– SF
Correlated
Non-correlated
A
A. A maximum of 3 non-correlated simultaneous masking signals.
Stimulusmodulation
FM (Warble): Adjustable modulation rate and depth
• Modulation rate: 1-20 Hz (default: 5 Hz).
• Modulation depth: 1-25% of center frequency (default: 5%).
SISI: 5, 2, 1 dB increments
Accuracy of sound level
Entire level range (AC): 125 to 5000 Hz: ±3 dB
5000 to 20000 Hz: ±5 dB
Entire level range (BC): 250 to 5000 Hz: ±4 dB
5000 to 8000 Hz: ±5 dB
Level resolution
1, 2, or 5 dB step resolution over the entire range
HL Range
Maximum output will be limited by the transducer.
AC: -10 to 120 dB HL (500 to 4000 Hz; supra-aural earphones)
BC: -10 to 80 dB HL (1500 to 3000 Hz; mastoid placement)
SF: 103 dB HL (Note: with external amplifier)
Total harmonic distortion
Air < 2.5 %
Bone < 5 %
Selectable transducers
AC: TDH39, HDA 300, and Insert Earphones
BC: Bone vibrator (Mastoid / Forehead)
24 Otometrics - MADSEN Astera²
16 Technical Specifications
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