audio recording with the optimus green sound level meters
Audio Recording with the optimus green
The audio recording provided by the optimus green sound level meters can be used to store samples of the noise being measured which can then be downloaded to the NoiseTools software to be analysed or played back to identify the source.
Recordings can be started using one of the following methods:
Benefits of Audio Recording
- Identify the noise source under investigation
- Record the audio signal for further analysis
- Replay the audio to determine the type of noise measured
- Trigger recordings when noise sources are active, ideal for remote noise monitoring
Audio recordings are stored with the noise measurements and are downloaded with the noise data into the NoiseTools software.
Recording Quality
The audio recordings made by the optimus green instruments are stored as WAV files with either Standard Quality or Studio Quality.
The default setting is to use the Standard Quality setting to reduce the amount of space required for audio recordings. The two options available are:
- Standard Quality: 16bit, 16kHz, WAV
- Studio Quality: 32bit, 96kHz, WAV
The manual option gives the user immediate control over the audio recording.
When a noise measurement is running, a soft-key is available which is labelled as Audio.
Pressing this soft-key starts and stops the audio recording using the selected quality.
This is the simplest way to make audio recordings with the optimus green instruments.
Threshold triggering can be used to record audio when a preset noise level is exceeded. For example, when the LAeq exceeds 55dB, recording can be started.
Up to 34 independent rules can be created using any of the available 1:1 or 1:3 Octaves or the LAeq, LCeq or LZeq parameters.
This allows the triggering to be created using anything from a simple level exceedence to a sophisticated level vs frequency system.
If more sophisticated triggering is required, the Rate-of-Change function can be used.
This uses an advanced algorithm to determine how fast the noise is changing and can be applied in terms of the overall level or frequency.
As with the Threshold triggering, up to 34 independent rules can be used to build up a sophisticated and detailed algorithm which can be used to detect noise sources quickly and easily.
VoiceTag audio recording
You can record a VoiceTag before each measurement and store notes, comments and information about the measurement for use in the NoiseTools software.
Complete Measurement Kits
To make sure that you can't measure the wrong thing, the optimus instruments measure, record and store every function available.
Find out more
Get more information about the optimus range and how an optimus sound level meter can make your noise measurements simple.
