AD 528 Clinical Audiometer

Model AD528
Manufacturer Interacoustics
Country of Origin Denmark
Included Parts
  • Main Unit (AD 528)
  • Power supply
  • Audiometric headset
  • Bone conductor
  • Patient response
  • Instructions for use
Optional Part
  • Audiometric headset DD450/DD45
  • Insert masking transducer
  • Monitor headset
  • Talk back
  • Free field speakers
  • Printer
  • Diagnostic software
  • OtoAccess™ database


Available Tests Basic License Extended License
Air, Bone and Free-field X X
Speech: CD,MP3, Microphone or Wave X X
Stenger X X
Modified Hughson Westlake X X
Békésy X
Langenbeck X
Weber X
Speech in noise and binaural speech) X
Sync license for integration with NOAH, local EMR systems or OtoAccess X


Power Supply 240V / 0.4A 50 Hz
Weight 1.5kg / 3.3lb
Dimensions (L×W×H) 11×28×36 cm / 4.3×11×14 inch
Display 5.0 inch high resolution color display 480×272 pixel
Compatible Software Diagnostic Suit – Noah OtoAccess XML Compatible
Internal Battery 230mAh, Li
PC Control (USB) Input/output for communication
Operation Environment Temperature: 15 – 35 °∁
Relative Humidity: 30 – 90 %
Ambient Pressure: 98 – 108 kPa
Printer (Optional) HM-E300 Printer Language: HP PLC3 / HP PLC3 GUI
Patient Response One handheld push button
Patient communication Talk forward(TF) and Talk back (TB)
Monitor Output through build in speaker, monitor headset or speaker
Stimuli Tone 125-8000Hz
Warble Tone 1-10 Hz sine +/- 5% modulation
Wave file 44100Hz sampling, 16 bits, 2 channels
Masking Automatic selection of narrow band noise (or white noise) for tone presentation and speech noise for speech presentation. Narrow band noise: IEC 60645-1 2017, 5/12 Octave filter with the same center frequency resolution as pure Tone. White noise: 80-20000Hz measured with constant bandwidth Speech Noise: IEC 60645-2:1993 125-6000Hz falling 12dB/octave above 1KHz +/-5dB
Presentation Manual or Reverse. Single or multiple pulses.
Frequency Range 125Hz to 8kHz
Free Field output (non-powered) Power Amplifier and Loud Speaker (With an input of 7 Vrms – Amplifier and loudspeakers must be able to create a Sound Pressure Level of 100 dB in a distance of 1 meter)
Intensity Available Intensity Steps is 1, 2 or 5dB
Speech Frequency Response
Frequency (Hz) Linear [dB]. FFequv [dB]
Ext. sign Int. sign Ext. sign Int. sign
DD45 125-250 +0/-2 +1/-0 +0/-8 +0/-7
250-4000 +1/-1 +1/-1 +2/-2 +2/-3
4000-6300 +0/-2 +0/-2 +1/-1 +1/-1
IP30 250-4000 +2/-3 +4/-1 Non-linear
250-4000 +12/-12 +12/-12 Non-linear
Internal Storage 50,000 sessions (500 clients, 100 sessions/client)
External Devices (USB) Standard PC mouse and Keyboard (for data entry) Supported printers (Please contact distributor for a list of approved printers)
External Signal Speech replaying equipment connected to the aux input must have a signal to noise ratio of 45dB or higher. The speech material used must include a calibration signal suitable for adjusting the input to 0dB VU
Microphone (Live speech) The microphone of the MTH400m is used for live speech. Microphone gain must be adjusted to 0VU prior to use.


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