R27A
Diagnostic Audiometer
2 CHANNEL TONE AND SPEECH TESTING DIAGNOSTIC AUDIOMETER
RANGE
■ Frequency range:
■ 125 – 8000 Hz (with DD45)
■ 125 – 12500 Hz (with HDA280)
250 – 8000 Hz (with B71W)
■ Range stimuli level -10 up to 120 dB HL
ACCURACY
■ Frequency < 0.5%
■ Distortion < 1%
■ Attenuator linearity 1dB per 5 dB step, max 3 dB
whole range
TYPE OF SIGNALS
Pure tone: sine wave 125 to 8 KHz signal
■ Warble: ± 5% frequency sine wave modulated, modulation: sine wave 5 Hz
Narrow band noise: 24 dB/oct filtered noise
■ Speech noise: 1 kHz 12 dB/oct filtered noise
■ White noise
■ External signal
■ External mike
■ Speech material recorded on SD card
On/Off rise – fall time: 40msec
OUTPUT TRANSDUCERS
■ ACR, ACL: 10 ohm DD45 matched pair earphone, alternatively
■ BC: B71W Radioear;
■ Free field output: 600 ohm impedance
STIMULUS PRESENTATION MODALITY
■ Presentation: Normal, Reverse, Extended (present tone for 1 second from 20 dB below the maximum level)
■ Modality: Continuous, Pulsed (rate 0.5, 1 and 2 Hz),Alternated (ABLB 0.5, 1 and 2 Hz)
Standard accessories
■ DD45, ADC or HDA280 headset for audiometry testing
■ B71W bone conductor
■ Patient microphone (talk back)
■ Internal speaker as monitor use
■ Built-in talk forward microphone
■ Patient response pushbutton
Built-in fast thermal printer
1 roll of thermal paper
Power supply cable (110 – 220 V)
■ Device dust cover
■ Multilingual Quick User’s Handbook
■ Pen-drive
■ SD-card with Multilanguage speech material
■ Resonance® MDS software
■ Spare fuse
Manufacturer Resonance – Italy