I was told that the mist produced by mist maker will adversely effect the echolocation of swiftlet.
To my suspicion, I search google and found the below article of which I still not quite understand.
So anyone in here can lighten me up will be highly appreciated.
Effects of Humidity on Sound
Contrary to what most people believe, there
is more sound attenuation in dry air than in damp air.
The effect is a complex one, and it is shown in
Figure 1-11. Note that the effect is significant only
at frequencies above 2 kHz. This means that high
frequencies will be attenuated more with distance
than low frequencies will be, and that the attenuation
will be greatest when the relative humidity is 20
percent or less.
Credit to Sound System Design Reference Manual by JBL
Today,Dec 2nd, I was kindly advised by my friend who is a physicist that the above article explained that
lower Relative humidity has more effect to high frequency sound than higher humidity.
But he also remarked that mist and relative humidity cannot be considered as same thing.
As mist is still a fine droplet of water,but for relative humidity, water is evaporated as gaseous stage and is almost homogeneous to air.
I guess a good physicist will be a good BH owner as sound , ventilation , temperature , humidity are mainly physic.
柬埔寨
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柬埔寨,一个还有很多原始森林的地方,是一个很适合养燕的地方。柬埔寨会不久的将来,成为一个生产燕窝的重要地方。
现在柬埔寨的养燕也开始在快速发展,开始有大型的燕屋陆陆续续的在建着。是时候开始转移战场了
EOF Swiftlet farming,养燕,引燕,燕屋,
4 years ago
What a great blog. Keep updating on the progress of ur BH. I can't wait to hear of ur success.
ReplyDeletecheers!
Thank you.
ReplyDelete