To determine the cause of excessive noise in the videos recorded by your Brave 7 camera, the following factors need to be considered.

In the Brave 7 camera, the audio capture system is designed to adapt to different environmental sound levels. When the surrounding environment is relatively quiet, the camera may automatically increase the audio gain to enhance the sound recording. This could potentially introduce some background noise amplification, which might be the source of the noise in your video. Conversely, if the environmental sound is too loud, the camera will reduce the gain for the external sound source to prevent audio distortion.

To verify if this is the case, you can perform the following tests. Take videos in noisy areas. In a noisy environment, the camera's audio capture system may adjust differently, and the noise pattern in the video may change. Additionally, you can speak while taking pictures (although this is mainly for testing the audio behavior). If the noise in the video is related to the automatic gain adjustment, the noise pattern should be different in these scenarios.

If you want to further control the noise in your video recordings, you can check the camera's audio settings. Some cameras have options such as manual gain control or noise reduction filters. Manual gain control allows you to set a fixed audio gain level, preventing the camera from automatically adjusting it based on the environment. Noise reduction filters can help reduce background noise during the recording process, but they may also affect the overall audio quality to some extent.

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