voice detection. just been sent some info. yes it is a stand alone unit and only picks up voice. but only voice commands that you pre-load into the unit. so back to the same problem. you can load names and commands and it will work but what commands would you use ??
but i have been thinking on how to get around your problem. you can buy a gsm dialer that sends sound to your mobile and you can also talk back via your mobile. this i think is better as you can hear names and everything they say. this system linked with the beams listed below will meet your needs for around $300
Invisible infrared beams are simultaneously broken. No alarm is caused when only one beam is blocked by a small object. When used to protect a wall or fence, a long interuption time will catch intruders, but let jumping cats pass by.
There are two models available. One that has a range of up to 21 metres and one that has a range up to 40 metres
Use in conjunction with a SM10 X10 Powerflash module to send X10 signals. If the Powerflash module is used you can have it signal any X10 module, one example is an SC546 X10 Chime Module which will "chime" to alert you.
Requires 12V power adaptor (not included).
Beam interuption time can be adjusted to suit individual situations
Easily aligned and installed
Compensates for changing weather conditions
Frost, dust and insect protection
Surface mounting
Suitable for indoor/outdoor use
Tamper switch