Inventis TIMPANI - Appendice A Technical Specifications

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Appendix A
Technical Specifications
226Hz tympanometry specifications
Probe tone
With AGC
Frequency and intensity
226 Hz ± 1%; 85 ± 1.5 dB SPL
Measurement range and
accuracy
0.2 to 8.0 ml
± 0.1 ml or ± 5% (whichever is greater)
Representation
Meatus-compensated
Influence of ambient
temperature
-0.003 ml/°C
Influence of atmospheric
pressure
-0.0002 ml/daPa
Scan range
Standard +200 to -400 daPa
Low +100 to -200 daPa
± 10 daPa or ± 10 % (whichever is greater)
Scan rate
400 daPa/s
Pressure control
automatic
Pressure safety limits
Upper limit 550 daPa
Lower limit -750 daPa
1000Hz tympanometry specifications - 1000Hz tympanometry license required
Frequency and intensity
1000 Hz ± 1%; 75 ± 1.5 dB SPL
Measurement range and
accuracy
0.9 to 16 mmho
± 0.5 mmho or ± 5% (whichever is greater)
Representation
Meatus-compensated
Reflex measurement specifications – Full reflex or 1000Hz-only reflex license
required
Type of stimulation
Ipsilateral, pulsed (50ms ON, 70ms OFF)
Stimulus frequencies and
accuracy
1kHz ± 1% (with 1000Hz-only reflex license)
500Hz, 1kHz, 2kHz, 4kHz ± 1% (with full reflex license)
Harmonic distortion
THD 2.5% maximum
Intensity and accuracy
70 to 100dB HL ± 3 dB HL
Duration of stimulus
1s
Type of test
- Fixed intensity, adjustable intensity, 5dB steps
- Threshold search, attenuator steps 5dB or 10dB, initial
value and final value adjustable through 5dB steps
Recognition threshold
Adjustable 0.04 or 0.06 ml ± 0.01ml
There is a negligible risk of artefacts in measurements at high
stimulus levels, and they do not influence the reflex
identification system
Test pressure
Automatic
- Tympanogram peak pressure
- Peak pressure less gradient (width of pressure curve
at half peak height)
- Atmospheric pressure