Requirements and recommendations for the Loud Sound Detection module

It is required to take into consideration that the detector reacts only to the level of sound. For the detector, the sounds of various types differ only by their levels. The subjective perception of the sound level by a person and the evaluation of the level of a particular sound among the sounds of the camera’s sound stream by the detector may differ; for example, the camera may be more sensitive to the sounds of a particular frequency, or it may subdue sounds according its own algorithms.

Another adverse factor is the high noise level that leads to the situation when some sounds that require a response (for example, shouts or banging of a door) become poorly perceivable against the sounds in the background, making the triggering of the detector unreliable.

Also, wind gusts perceived by a camera microphone not protected against the wind may lead to the false triggering of the loud sound detector.

The abovementioned factors are required to be taken into consideration at the stage of choosing a camera or a microphone as well as when setting up the detector.