Page 17
Sound Level Meters – User Manual
4.6
Audio recording
Audio recording can be started manually using the audio soft key or automatically using the
audio triggers.
This starts the instrument recording raw WAV data at a quality that can be set in the menu
(standard, high or studio).
Details of the audio triggers can be found in Technical Note 28 - Audio Recording with the
Optimus Green sound level meters. Please refer to the Cirrus Research plc website at
www.cirrusresearch.co.uk/library/optimus.
Pressing the audio key again stops the recording. There is no maximum duration of an audio
recording set by default, but this can be changed in NoiseTools, and the parameters for the audio
triggers can be configured in NoiseTools.
The audio recording includes a 10 second back buffer (on the standard quality setting). When
triggering a recording manually, it is very difficult to record the beginning of a sound that catches
your attention.
The back buffer will cover the time it takes you to respond and press ‘record’. 10 seconds is the
default duration, which can be changed in NoiseTools.
The time history display and analogue bar turn
blue
when audio recording is running and revert
to
green
when it has stopped.
Starting and stopping audio recordings during a measurement does not affect the noise
measurement data being recorded.
Please note, VoiceTags are recorded BEFORE the measurement starts and are for spoken notes
only, not for analysis of recorded sounds.
Summary of Contents for Optimus+
Page 1: ...Instrument Handbook Optimus GPS Sound Level Meters...
Page 22: ...Page 22 Optimus Sound Level Meters User Manual A pin identifies the measurement location...
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Page 53: ...www cirrusresearch com sales cirrusresearch com...
