Norsonic nor145 User manual

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’

Reference Tone
Recording
The ‘Settings’
GREEN ✔
GREEN ✔

The ‘Settings’
Go back to the SETUP screen.
PRESS THE GREEN ✔

Go to ‘Instrument’
The ‘Settings’

Go to ‘Reference Tone’
The ‘Settings’

Reference. Tone: ON
Gain volume: -48dB
Type of noise: Pink Noise
Excitation. Time: 30 seconds
Note: Used in marker
Marker 1: should be labelled ‘reference tone’.
The ‘Settings’

The ‘Settings’
Go back to the MEASUREMENT
screen.
PRESS THE GREEN ✔

Press the START key &
start your measurement.
The ‘Measurement’

Press SETUP
The ‘Measurement’
Tap the Marker Button
Tap the Reference Tone
Wait 30 seconds

Download the measurement to
NorReview
The ‘Measurement’

Find the audio recording
reference tone (pink noise)
and play it back through
the speakers.
Note the output level.
It might not be exactly
70dB.
The ‘Playback in NorReview’