On 2010年09月30日 23:34, Zhang Weiwu wrote:
If it works outdoor it's enough. No need to use indoor.
If it can find the 'partner' in 150 meters it's good enough. 300
meter even better. Longer not needed.
In fact, consider the low requirement of the application, a simple
device like this will do:
- have a button on one device
- have a beep device on the other
- if I press the button it give a short beep so loud that I can
hear in 150 meters
Then I will be able to use the nature radar: my hearing ability, to
locate the object. It's actually pretty precious, precious for my
scenario. With a single beep I have both angel information and distance
information. (To not to bother others too much, using a recorded dog
bark instead of a beep would be helpful.)
|