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You can't adjust the sensitivity of the sound detection; it's either on or off. I got notifications of birds chirping first thing in the morning, when the neighborhood was otherwise quite quiet, but I didn't get notifications throughout the day about every car that went by. For motion, the camera can record a clip of all the motion it sees, but the app lets you choose to be notified only of people. This is a great feature — I certainly don't want a push notification every time a car goes by — and it worked very well. I never got a notification of a person that wasn't actually a person. Then, you can just open the app to see a timeline of all motion events, not just people.