Documentation for Axxon One 2.0. Documentation for other versions of Axxon One is available too.

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Hardware and audio data requirements for the operation of the Audio classification IV are given in the table:

MicrophoneThe Microphone object must be enabled (see The Microphone object)
StreamThe detector requires a single-channel (mono) audio stream

Audio data format

Audio data must be transferred in 16-bit signed integer PCM format

Sample rateSupported sample rate: 8000, 16000, 32000, 48000 Hz. We recommend 16000 Hz
Hardware

For the correct operation of the audio analytics algorithms, you must disable all embedded DSP features of audio processing on your audio hardware or in drivers, as they can distort the original audio signal and interfere with recognition. These features include:

  • Automatic Gain Control (AGC)
  • Noise Suppression/Cancellation
  • Beamforming
  • Echo Cancellation
  • Equalizers (EQ) and High Pass Filters (HPF)
Sound pressure level (SPL)

For the detector to generate an event, the sound pressure level (SPL) from the target event must be within the following ranges (measured with a sound level meter):

  • In a noisy environment: at least 80–82 dB
  • In a quiet environment: at least 58–60 dB


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