@DazAA 

Hi,
1. You can refer to the link below to see some tips to reduce motion detections from rain, snow, etc.
How to reduce motion detections from rain, snow, or insects, etc.?
 

The basic camera's detection mechanism is based on image changes between different frames. The frame is one of the many still images which compose the complete moving picture. If there is a difference between the frames, the camera will recognize it as a motion detected.
When it rains, the raindrops will cause a significant change in the image, therefore this kind of detection cannot be avoided.

2. Generally, the camera will send the related notifications to your phone when it detects events and when the notification feature is enabled on the camera, however, the sound of the notification depends on the settings of your phone, and the camera/Tapo app won't change the notification sound settings on your phone.
In your usage scenario, can you share the pictures of your phone's notification settings and a video showing the Tapo notifications ignore these settings for further analysis?

Best Regards

  @DazAA 

Hi,
Thank you for the picture and video.
Generally, the detection notifications will be sent to your phone and the Tapo app, we did a test and found that the notifications sent to your Android phone will apply the notification settings you configured on your phone, but the notifications received on your Tapo app won't. 

In your usage scenario, whether you hear the notification sound only when you open the Tapo app?

Best Regards

  @DazAA 

Hello, 
Thank you for your feedback here, we certainly appreciate your feedback and feature request.
While we don't have any specific details that I can share about if this feature can come to the product/app or when it might, I'll log the feature request and pass it along to the team to evaluate.
Best Regards