otometrics AURICAL Aud, Reference Manual

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Ambient Noise Status
The ambient noise level is above the maximum permissible level calculated by the stand-
ard. Reduce noise if possible.
The measured ambient noise level is above the maximum permissible noise level.
However, the level is so low that it may be noise from FreeFit itself, rather than ambient
noise.
A Connect button is displayed if FreeFit is not connected.
If you view the
Ambient Noise Assessor
dialog in an Audiometry test screen other than
Tone
or
Speech
, you can view the ambient noise bar graph, but no maximum permissible
level is calculated, and therefore no status can be displayed. A question mark is also dis-
played if no audiometer is connected.
7. If you are using TDH39 headphones with Peltor noise reduction enclosure, select the
With Peltor
option.
Note
•
The ANSI standard used to calculate the maximum permissible noise level is based on use of the
TDH39 with Peltor noise reduction.
8. To see a live graphical display of ambient noise, click the Show Details button .
– The curve shows the maximum permissible ambient noise level for the selected stimulus.
– The columns show the current measured noise for each 1/3 octave band between 125 Hz and 8 kHz. Each column
is green, orange, or yellow, corresponding to the color symbols described above.
– If the measured noise exceeds the maximum permissible level 2 seconds before or 0.5 seconds after the stimulus
is presented, a warning marker is displayed at the corresponding frequency. The warning marker will disappear if a
new measurement is made when the ambient noise level is OK. The warning marker also disappears if you switch
to a new test frequency.
9. When the noise level is acceptable to you, you can store a point in the audiogram as you would normally.
66 Otometrics - AURICAL Aud
2 Navigating in the OTOsuite Audiometry Module