JoeLee

澳洲週圍都是大葵. 佢哋無論在樹上或在半空飛行中都鐘意叫幾聲。那叫聲的響亮情度係好勁。係整個區的居民都聽到。如果在香港屋苑養大葵，佢叫一聲就全屋苑的居民都聽到。


以下的文章”Sunday Morning Birdlife in Sydney, Australia" 深刻描繪了大葵的叫聲.值得你的參考。

http://www.bbc.co.uk/ouch/messageboards/A256592

文中提及大葵叫聲係110dB。以下的資料供你了解一下110分貝的聲浪係怎樣一回事：

50 dB    refrigerator
50 - 75 dB washing machine
50 - 75 dB air conditioner
50 - 80 dB electric shaver
55 - 70 dB dishwasher
60 - 85 dB vacuum cleaner
60 - 95 dB hair dryer
65 - 80 dB alarm clock
75 - 85 dB flush toilet
80 dB ringing telephone
110 dB baby crying
90 - 115 dB subway
120 dB ambulance siren
130 dB jackhammer, power drill
130 dB percussion section at symphony
140 dB airplane taking off
95 - 110 dB motorcycle
110 dB symphony concert
110 dB car horn
110 -120 dB rock concert
112  dB CD player on high
117 dB football game (stadium)
150 dB firecracker
157 dB balloon pop
162 dB fireworks (at 3 feet)
163 dB rifle
166 dB handgun
170 dB shotgun