Audiometry
Audiometry
(from Latin: audīre, "to hear" and metria, “to measure") is a branch of audiology and the science of measuring hearing acuity for variations in sound intensity and pitch and for tonal purity, involving thresholds and differing frequencies.


Audiometer: PDD-401
- PC based screening audiometer for the air conductive examination of hearing system
- IEC 645-1 standard
- Class Type 4 and Type
- EN ISO 7029:2000 Statistical distribution of hearing threshold s as a function of age
- Interpretation by PTA (Pure Tone Average)
- Interpretation by Grade of Hearing Impairment
System integration
- System integration with Piston spirometers
- System integration into information networks
- Health Level 7 (USA)
- Geräte Daten Träger (Germany)
Database management system
- Unlimited storage of patients and results
- Full support of pre-post examinations
- Trend analysis
Connecting to a laptop PC provides full portability in battery mode as well
- Operating modes
- Patient interface
- Technical data
- Manual
- Semi automatic ascending iteration according to Hughson-Westlake protocol
- Semi automatic descending iteration
Program able automatic sequence - Signal types
- Continuous
- Pulse
- Interrupted - Patient interface
- Telephonics TDH 39 built into a Peltor noise protecting case with 40 dB attenuation
- Patient feedback with hand switch
- Built-in microphone to communicate with the patient
Technical Data
Frequency: 125Hz, 250Hz, 500Hz, 750Hz, 1kHz, 1.5kHz, 2kHz, 3kHz, 4kHz, 6kHz, 8kHz
Sound Pressure Level: -10dB, 110dB
Total harmonic distortion: < 1 %
Frequency deviation: < 1%
IBM/PC connection: USB port
Audiometer interface: L 150 mm * W 82 mm * H 45 mm
Weight: 210g
Power supply: External power supply not required