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Summary of Contents for Norsonic Nor140
- Page 1 Norsonic Nor140 Reference Tone Used to reference the correct audio playback level for the listener.
- Page 2 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. sound recording continuous pink noise sound level of around 70dB which can be played back...
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Page 3: Pink Noise
Pink noise is like the Pink Noise sound of the radio tuning. - Page 4 Pink Noise Adjust the volume of speaker until 70dB is reached at the listening point.
- Page 5 Pink Noise Adjust the volume of speaker until 70dB is reached at the listening point.
- Page 6 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.
- Page 7 The ‘Settings’ Press SETUP...
- Page 8 The ‘Settings’ Press Button 1 for the 1:Instrument Menu...
- Page 9 The ‘Settings’ Press Button 8 for the 8:Reference Tone...
- Page 10 The ‘Settings’ Reference. Tone: Type of noise: PINK Gain volume: -48dB Excitation. Time: 30 seconds Freq: 1.0kHz...
- Page 11 The ‘Settings’ Press ENTER to return...
- Page 12 The ‘Settings’ Press ENTER to return to ‘Measurement Screen’...
- Page 13 The ‘Settings’ Press the START Key Press Button 6 to got to ‘Level vs Time’...
- Page 14 The ‘Settings’ Press the .CAL button to activate the reference tone You will notice the sound level will increase to 70dB. It will end automatically after 30 seconds. The sound is noise and can be played back in NorReview or Windows Media Player.
- Page 15 The ‘Settings’ Download the measurement to NorReview...
- Page 16 The ‘Playback in NorReview’ 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.
- Page 17 The ‘Output Level’ Place your sound level meter at the listening point. 68.5...
- Page 18 The ‘Playback’ Playback the sound and adjust the speaker volume until the sound meter reads the output level you noted. 68.5...
- Page 19 The ‘Playback’ The sound level meter might not read exactly 68.5dB, but should be as close as reasonably possible without any external influence (background noise). 68.5...
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