Amcrest ProHD input abnormality (audio channel)

[Rollo]

Hi,

I have contacted the support already but thought I would post it here too. I have purchased the Amcrest ProHD 1080p camera IP2M-841 (fw 2.520.AC00.18.R, Build Date: 2017-06-29) to monitor my dog with separation anxiety problem. It means that the dog from time to time gets really loud when alone, therefore the audio detection feature is the most important for me.

I set my camera as follow:
• noise filter [disabled]
• audio detection [enabled]
• audio intensity change [enabled]
• audio sensitivity [20]
• audio threshold [90]
• email notifications enabled for audio alerts only

The camera works well during a day and detects all louder barks and door slams correctly and skips all other lower sounds as expected, I am totally satisfied with it. But something goes wrong during a night. When room gets really silent the camera starts producing 'input abnormality' alerts every 30-60 seconds. For example. Last night between midnight and 6am I received six hundreds of such alerts just in 6 hours. Because of these alerts, the camera stars recording too and effectively ends up with the whole night recorded when nothing really happened. Is there a way to disable 'input abnormality' alerts for audio channel? I really don't need nor want to get alerted when my house gets too quiet. It's my target in the first place. I don't want to black out the night time in audio schedule as barking can happen during a night too. And if that happens I would really want to know first before neighbors call the police.

Please advise. Thank you.

[Balnacra]

I have this same problem on 2 of 3 720P models. The problems started after a software update a while ago. Disabling the noise filter prevents the problem on one of the cameras. I may try using an external microphone to see if that helps. This is an irritating bug that should have been fixed by now!

[Balnacra]

I determined a fix! As I noted in previous posts, it is helpful to disable the noise filter. If that doesn't solve the problem, I confirmed with two of my cameras that raising the microphone volume to 70 eliminates the abnormality alarm. (The default volume level is 50.) As another poster noted, it seems that if the microphone doesn't pick up enough background noise it thinks there is a problem and triggers the abnormality alarm. So it makes sense that raising the volume a bit would cause the microphone to hear at least a minimal amount of background noise and convince itself that everything is working correctly.