| Name : |
Middle-ranged Sound Speaker System |
|
|
| |
Description : Middle
ranged speaker
The purpose is to send the sound waves into the air to attract swiftlet
that may pass the area.
The speakers are waterproof and normally kept indoor at the entry hole.
This special type speaker could help in reduce noise pollution of
neighborhood nearby.
The range of distance traveled by the sound produced by speaker is
approximate 500 M - 700 M.
