AMBIsense

Data formats

Within the AMBIsense solution, measurements of the 1/3 octaveband spectrum are performed. The results of these measurements can be exported in multiple formats:

• as a self explanatory CSV-table
• as either of the following very simple, yet efficient propriatairy binary formats:
  • phen1 file: a very restrictive format, making small datasets available as small as possible, while maintaining random accessibility on row level
  • as an ABT file: fast and efficient random access (both on row and column level), binary table format

Instant measurements

The AMBIsense-sensors can be confiured to send instant measurements to a dedicated MQTT-broker. These have the following structure:

• audio-measurements (8 messages / s):
  • topic: /instant/<deviceName>/measurements
  • payload: in mspack:
    • timestamp: float
    • dBA: float (sound level)
• classifications (frequency depends on model):
  • topic: /instant/<deviceName>/classification/<modelId>/<modelVersion>
  • payload: in msgpack:
    • timestamp: float
    • confidences: float[] for each class