Page 20 OM023-4 Amplivox 260 Operating Manual
7 Technical Information
Audiometer
Audiometer type: Type 2 (IEC 60645-1:2001)
Type B-E (IEC 60645-2:1993)
Type 3BE (ANSI S3.6:2004)
Frequency Modulation
Carrier frequencies: 125Hz to 8kHz as per pure tones
Modulation waveform: Sinusoidal
Rising and falling symmetry: Symmetrical on linear frequency scale
Modulating frequency: 15.625Hz
Frequency deviation: +/-10%
Speech Channel
Frequency response: +/-3dB, 100Hz to 10kHz at output
terminals (e.g. headphone or line out)
Voltage requirement at 0dB
input level setting to zero meter: 1.20Vrms at 1kHz
Output level: 90dBSPL at 1kHz for attenuator setting of
70dBHL with level meter at 0dB
Masking Sounds
Masking sounds available: Narrow bands at test frequencies and
Speech weighted noise
Narrow-band noise bandwidth: Meets IEC 60645-1; ANSI S3.6
Speech noise bandwidth: Meets IEC 60645-2; ANSI S3.6
Reference levels: Refer to ISO 389-4
Insert Masking Earpiece
Calibration method: With 2cc coupler compliant with IEC 126
Transducers
Types and reference levels: DD45: ISO 389-1, Table 2
E-5A: ISO 389-2, Table 1
B-71: ISO 389-3, Table 1
Static headband force: Headphones: 4.5N
Bone vibrator: 5.4N
Bone vibrator calibrated: For mastoid placement &
unoccluded test ear
Sound attenuation characteristics: ISO8253-1, Table 3
Airborne sound from bone vibrator: See Br. J. Audiol. 1980, P73-75
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