Norsonic nor145 Manuel utilisateur
Norsonic Nor145 & Nor150
Reference Tone
Used to reference the correct audio playback level for the listener.
Reference Tone
The reference tone is a sound
recording made on the device by
pressing the CAL button. It’s an
internal sound linked to the internal
gain and input sensitivity of the
microphone.
The sound recording has a
continuous pink noise sound level of
around 70dB which can be played
back through the speakers or
headphones as the reference level.
The sound recording when played
back is much like the sound you
hear when trying to tune your radio
to the correct frequency. This noise
will be played back through the
speakers which we will reference
our human ear and sound meter to.
70
dB
Pink Noise
Pink noise is
like the
sound of the
radio tuning.
Pink Noise
Adjust the volume
of speaker until
70dB is reached at
the listening point.
70
dB
Pink Noise
70
dB
Adjust the volume
of speaker until
70dB is reached at
the listening point.
Adjusting the sound level
of the speaker to the
reference tone (pink noise)
helps us perceive how
loud or quiet a recording
is in the context of the
complaint.
70
dB
Load in your NNR app
Press SETUP
The ‘Settings’
Go to ‘Marker’
The ‘Settings’
Turn ON ‘Marker 1’
Edit ‘Marker 1’
The ‘Settings’
GREEN ✔
Name: Reference Tone
Type: Toggle
Colour: Firebrick Red
Action: Recording & Reference Tone
The ‘Settings’
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