Complaint
Head Phone | 39P (AC). B71 (BC) |
Power Supply | 230V AC transformer, 50Hz |
Dimensions | 45x 30x 9.5cm |
Packing | 51x 40x 27cm |
Weight | 1.775kg |
Microphone | Internal |
Out put | Air conduction, Bone conduction. Free field | |
Frequency | AC | BC |
125Hz | -10-90HL | -10-45HL |
250 Hz | -10- I00HL | -10-45HL |
500-750Hz | -10- 120HL | -10-70HL |
1000.3000Hz | -10- 120HL | -10-70HL |
4000Hz | -10-120HL | -10-60HL |
6000Hz | -10-110HL | -10-50HL |
8000Hz | -10-110HL | |
Masking | Pure tone& with contralateral white noise test | |
Tests | AC test, BC tests, speech test, speech with noise test | |
Tone | Continuous pure cone, pulse tone, warble tone | |
Precision | Sound pressure:± 1 dB, | |
Frequency | better than 1% | |
Distortion | Air conduction: ≤2.5%, Bone conduction: ≤5% | |
