Audioscan Verifit 2 - Manual (Page 143)

Verifit ® User's Guide Version 4.2 © June 2015
On-Ear
Speakers (ducted port)...............................................2
......................................................................@5x9 cm
....................................................................@2x3.5 in.
Probe microphone tube...................................Silicone
......................................1 mm diameter x 75 mm long
Probe modules...........................................................2
..............Each with probe and reference microphones
Probe microphone noise floor......................................
.........................................200–12500 Hz < 45 dB SPL
Frequency Range.................................200–12500 Hz
Frequency modulation...................................Sawtooth
.........................................................±3% over 128 ms
Stimulus levels at reference microphone for tones
..............................................................40–85 dB SPL
.....................................................................5 dB steps
Stimulus accuracy at reference mic for tones
...........................................200-2000 Hz ±1.5 dB SPL
.........................................2000-8000 Hz ±2.5 dB SPL
.......................................8000-12500 Hz ±4.0 dB SPL
Equalization Method
...........................Real-time modified pressure method
...............................................(Stored for open fittings)
Analysis........................................................................
.........................Swept tone frequencies per octave 12
............................Burst tone frequencies per octave 3
..................................Speech & Noise filter 1/3 octave
Measurement accuracy for tones @ 1kHz.........±1 dB
....................................re: 1 kHz 200 – 5000 Hz ±1 dB
.................................re: 1 kHz 5000–8000 Hz ±2.5 dB
...............................re: 1 kHz 8000–12500 Hz ±3.5 dB
Measurement range....200–2500 Hz 30–135 dB SPL
...........................................2500–12500 Hz 30–140dB
STIMULI
ISTS
Frequency-modulated tone
Tone burst,
Pink noise
Dual-direction noise
Calibrated speech
Filtered speech (for frequency-lowering tests)
Live speech
ANSI S3.46 - 2013 TESTS AVAILABLE
Real-Ear Unaided Response
Real-Ear Aided Response
Real-Ear Occluded Response
Real-Ear Insertion Gain
OTHER TESTS AVAILABLE
Speechmap®
Real-time adaptive directional verification
Frequency-lowering instrument verification
Harmonic distortion
Spectral analysis
Noise reduction verification
Feedback suppression verification
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