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Pulsed stimuli are used for ipsilateral Reflex Screening and Reflex Threshold testing.
Period:
Stimulus On time:
Stimulus Off time:
Rise/fall time:
On-Off ratio:
A weighted SPL in Off:
Broadband noise
Contralateral TDH-39 headphone
Bandwidth:
Slope:
Level:
Contralateral insert earphone and ipsilateral probe
Bandwidth:
Slope:
Level:
Lowpass noise
Contralateral TDH-39 headphone
Band limit:
Slope:
Level:
Contralateral insert earphone and ipsilateral probe
Bandwidth:
Slope:
Level:
Otometrics - MADSEN Zodiac
Characteristics for pulsed stimuli (ipsilateral)
Stimulus presentation control
70 dB (for stimulus level > 95 dB HL)
Contra supra-aural TDH 39: 33 dB
Contra insert phone: 23 dB
250 - 6000 Hz. Tolerance ±5 dB re. 1 kHz level.
Spectrum level drops between 6000 and 9500 Hz and remains below -23 dB
re. 1 kHz level for frequencies above 9500 Hz.
Noise level is indicated in dB HL. Tolerance ±5 dB.
400 - 4000 Hz. Tolerance ±5 dB re. 1 kHz level.
Spectrum level drops between 4000 and 7000 Hz and remains below -23 dB
re. 1 kHz level for frequencies above 7000 Hz.
Noise level is indicated in dB HL. Tolerance ±5 dB.
1600 Hz (nominal -3 dB point)
The slope is between -12 and -18 dB/octave above 1600 Hz, with an additional
±6 dB tolerance. Above 8500 Hz, the spectrum level remains below -34 dB re.
1600 Hz level.
Noise level is indicated in dB HL. Tolerance ±5 dB.
1600 Hz (nominal -3 dB point)
The slope is between -12 and -18 dB/octave above 1600 Hz, with an additional
±6 dB tolerance. Above 8500 Hz, the spectrum level remains below -34 dB re.
1600 Hz level.
Noise level is indicated in dB HL. Tolerance ±5 dB.
19 Technical specifications
120 ms
56 ms
64 ms
5.5 ms
131
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