SpyPhone application can turns your phone into a full remote surveillance tool. You just dont need to active spy, but the phone will alert you whenever something interesting is happening around your phone.
The basic setup is simply set the “agent” from menu that’s the contact’s telephone number that should be informed in the case of an emergency the the phone at the place that you want to monitor, for example next to a baby.
From now on, the application will constantly monitor the audio level of baby’s surroundings. If they exceed  threshold, the phone will spy and automatically call the agent.
The application is developed in Python Editor for S60 and is available for free as open source. Installation instructions are included in the download.
Download_SpyPhone