Siemens SD 270 User Manual

40
7 Technical Information
Audiometer
Audiometer type: Type 2 (EN60645-1)
Type B-E (IEC 60645-2)
Frequency Modulation
Carrier frequencies: 125Hz – 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 from 100Hz to
10kHz electrical
Input voltage requirement
at default level to zero meter: 600mVrms at 1kHz
Output level: 90dBSPL at 1kHz for attenuator set-
ting of 70dBHL with level meter at
0dB
Masking Sounds
Masking sounds available: Narrow bands at test frequencies
and Speech weighted noise
NB noise bandwidth: Meets EN60645-1
Speech noise bandwidth: Meets EN60645-2

Siemens SD 270 Specifications

General

Brand	Siemens
Model	SD 270
Category	Measuring Instruments
Language	English