Interacoustics AA222 - Page 70

AA222 Instructions for Use – US Page 64
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 Functions
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.
Audiometry measure system
Air Conduction
DD45:
TDH39:
HDA300:
HDA280:
E.A.R Tone 3A/5A:
IP 30:
PTB/DTU report 2009
ISO 389-1 1998, ANSI S3.6-2010
PTB report PTB 1.61 – 4064893/13
PTB report 2004
ISO 389-2 1994, ANSI S3.6-2010
ISO 389-2 1994, ANSI S3.6-2010 DES-2361
Bone Conduction
B71: ISO 389-3 1994, ANSI S3.6-2010
B81: ISO 389-3 1994, ANSI S3.6-2010
Placement: Mastoid
Free Field
ISO 389-7 2005, ANSI S3.6-2010
Effective masking
ISO 389-4 1994, ANSI S3.6-2010