jeffkow18
11-06-2003, 07:20 AM
Hi :
firstly i would like to say sorry about post something other than mobile stuff .
now i am seaching some divice that can play bird sound in low frequency so that human can not heard the sound.
accually we are playing the sound to attract the bird to house, because of the sound are too loud and cause noisy environment, so i am planning to search or build some device can play low frequency sound so that only swallow can hear it .
thank for the help
For people who have walet or bird house please private message me :D
firstly i would like to say sorry about post something other than mobile stuff .
now i am seaching some divice that can play bird sound in low frequency so that human can not heard the sound.
accually we are playing the sound to attract the bird to house, because of the sound are too loud and cause noisy environment, so i am planning to search or build some device can play low frequency sound so that only swallow can hear it .
thank for the help
For people who have walet or bird house please private message me :D