Channel:Two independent signal channel and masking channel
Frequency: Air conduction and free sound field 250-8000Hz; (Bone conduction 250-6000Hz)
Masking: Pure tone test, white noise

Sound pressure range:

HZ AC BC

250 -10～100 -10～45

500 -10～120 -10～60

750 -10～120 -10～60

1000 -10～120 -10～70

1500 -10～120 -10～70

2000 -10～120 -10～70

3000 -10～120 -10～70

4000 -10～120 -10～60

6000 -10～110 -10～50

8000 -10～110

Output interface: Air conduction earphone,Bone conduction earphone,free sound field
Standard function: Pure tone test.Provide continuant,pulse voice and warble tone
Normal: Press INT to start sound stimulate
Inversion: Press INT to stop sound stimulate.5dB step and 5dB step continuous attenuation,1DB error.
Distortion: Air conduction: <2.5%; Bone conduction: <5%
Operation Environment: Temperature + 10 °C-+ 35 °C, air temperature 30%-90%,
Air pressure:860hPa – 1060hPa
Preheating time: Less than 10 minutes
Size: W×H×D=430×300×70 mm
Weight: About 6.5 kg
Power supply: 220VAC, 50Hz
Maximum power : 60VA
Executive standard: EN60645-1, EN60645-2,EN60645-4,and ANSI S3.6-1996
Safety standard: EN 60601-1, Level 1 class B EN 60601-1-2；EN 60601-1-4
Standard accessory: TDH39 Air conduction earphone, responder, power line