AA222 Middle Ear Analyzer & Audiometer



Model AA222
Manufacturer Interacoustics
Country of Origin Denmark
Included Parts
  • Main Unit (AA222)
  • Clinical or diagnostic Probe
  • Contralateral Headphone
  • DD45 Audiometric Headset
  • Monitor Headset
  • B71 Bone Conductor Headset
  • APS3 Patient Response Switch
  • Power Cable
  • User Manual
  • Daily Calibration Cavity
  • Floss kit
  • Assortment bag BET55
Optional Part
  • Printer Kit including MTP III Printer
  • CAT50 Calibration Cavities
  • IP 30 / CIR 33 Insert Phone
  • TDH39 Headphone
  • HDA 300/280 Audiometric Headset
  • Talk Back Microphone
  • Ear tone 5A 10 ohms & 3A 10 ohms
  • Amplivox Audiocups, Noise Reducing Headset
  • Free Field Speakers
  • Wall Mount
  • Diagnostic Software
  • OtoAccess database
Available Tests Basic License Extended License
Basic Audiometry X X
ABLB – Fowler X X
Speech X X
Stenger X X
Auto Hughson Westlake X X
Speech Ch2On X
Speech in Noise X X
Weber X X
Quick SIN Optional Optional
Tymp 226Hz X X
Ipsi Lateral Reflex X X
Contra Lateral Reflex X X
ETF 1 test non-perforated tympanic membrane X X
ETF 2 test perforated tympanic membrane X X
Reflex decay X X
Tymp 678, 800 & 1000Hz X
Manual tympanometry X
ETF 3 patulous tympanic membrane X
Reflex latency X


Power Supply 240V / 1.5A
Weight 3.1kg / 6.8lb
Dimensions (L×W×H) 9×33×44 cm / 3.5×13×17.3 inch
Compatible Software Diagnostic Suit – Noah OtoAccess
Warm Up Time Approximately 1 minute
Patient Response Switch Two push Button
Operation Environment Temperature: 15 – 35 °∁
Relative Humidity: 30 – 90 %
Ambient Pressure: 98 – 108 kPa
Monitor Output through built-in speaker or through external earphone or speaker
Audiometry Measure System
Stimuli Tone 125-8000Hz. Resolution 1/2-1/24 octave.
Warble Tone 1-10 Hz sine +/- 5% modulation
Pediatric Noise A special narrowband noise stimulus. The bandwidth is frequency depended 125-250 Hz 29%, 500Hz 24%, 750 Hz 20%, 1kHz 17%, 1.5kHz 13%, 2kHz 11%, 3kHz 9% from 4kHz and up is fix 8%,
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.
Presentation Manual or Reverse. Single or multiple pulses.
Frequency Range 125Hz to 8kHz (Optional High Frequency: 8 kHz to 20 kHz) 125Hz, 250Hz, 750Hz, 1500Hz and 8kHz may freely be deselected
External Signal Speech replaying equipment connected to the CD inputs must have a signal-to-noise ratio of 45 dB or higher. The speech material used must include a calibration signal suitable for adjusting the input to 0 dBVU.
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)
Internal Storage 500 patients and unlimited sessions/measurements/audiograms
External Devices (USB) Standard PC mouse and Keyboard (for data entry) Supported printers (Please contact distributor for a list of approved printers)
Patient Communication Talk forward and talk back
Impedance Measuring System
Probe tone Frequency level 226 Hz, 678 Hz, 800 Hz, 1000 Hz; pure tones; ±1% 85 dB SPL (≈ 69 dB HL) ±1.5 dB
Air pressure Control: Indicator: Range: Pressure limitation: Pump speed: Automatic. Measured value is displayed on the graphical display. -600 to +400 daPa. ±5% -750 daPa and +550 daPa. Automatic, Fast 300 daPa/s, Medium 200 daPa/s, Slow 100 daPa/s, Very slow 50 daPa/s.
Compliance Range 0.1 to 8.0 ml at 226 Hz probe tone (Ear volume: 0.1 to 8.0 ml) and 0.1 to 15 mmho at 678, 800 and 1000 Hz probe tone. All ±5%
Test Types Tympanometry Automatic, where the start and stop pressure can be user programmed in the setup function. Manual control of all functions
Eustachian tube function 1 – Non perforated eardrum Williams test
Eustachian tube function 2 – Perforated eardrum Toynbee test
Eustachian tube function 3 – Patulous Eustachian tube Continuous sensitive impedance measurement
Reflex Function
Signal Sources Tone – Contra, Reflex: THD: 250, 500, 1000, 2000, 3000, 4000, 6000, 8000 Hz, Wide Band, High and Low pass. Less than 5 until 110 dB, 5 % above 110 dB (supra-aural headphones), less than 5 % until 110 dB, 10 % above 110 dB (insert earphones or probe).
Tone – Ipsi, Reflex 500, 1000, 2000, 3000, 4000 Hz wide band, high and low pass.
NB noise – Contra, Reflex 250, 500, 1000, 2000, 3000, 4000, 6000, 8000 Hz
NB noise – Ipsi, Reflex 1000, 2000, 3000, 4000 Hz
Stimulus duration 750 ms
Reflex Acceptance Adjustable between 2 % and 6 %, or 0.05 – 0.15 ml change of ear canal volume
Intervals Down to 1 dB step size
Intensity max 90, 100, 120 dB HL
Outputs Contra Earphone TDH39 earphone, DD45 earphone, CIR insert and/or EARtone 3A insert, IP30 for Reflex measurements
Ipsi Earphone Probe earphone incorporated in the probe system for Reflex measurements
Probe connection Connection of the electrical and air system to the probe
Test types Manual Reflex Manual control of all functions
Automated Reflex Single intensities Reflex growth
Reflex Decay Automatic, 10 dB above threshold and manually controlled with stimulus durations of 10 s.
Reflex Latency Automated, first 300 ms from stimulus start


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