科學60秒:辦正事兒呢，我沒傻笑
來源：滬江聽寫酷
2011-04-01 15:49
請大家聽寫填空~
Spotted hyenas grunt and growl. But you know what they're famous for. [Hyena sounds.] So what's all the laughing about?
Well, field researchers have noticed that groups of hyenas tend to ___1___ around a kill, while they're waiting for their hunk of meat. Now a study in the journal BMC Ecology says the chuckles may communicate things like age, identity and ___2___. Which is important stuff for figuring out who gets the tastiest cut of zebra.
Researchers studied a clan of spotted hyenas living in a sanctuary behind the U.C. Berkeley campus. They ___3___ 17 hungry hyenas with bones or pieces of meat, and recorded about 250 bouts of giggling. Then they ran those sound bites through various computer algorithms, running statistical analyses and ___4___ spectrograms.
The result? They say a giggle's pitch and timbre establish a hyena's identity, and that pitch indicates age. But the giggle also tells you who's boss. A relatively monotone giggle [hyena sound] and you're first to the meat. A more erratic, variable giggle? [Hyena sound] Get back in line.
The researchers next plan to study hyenas in the wild. ___5___.
Spotted hyenas grunt and growl. But you know what they're famous for. [Hyena sounds.] So what's all the laughing about?
Well, field researchers have noticed that groups of hyenas tend to ___1___ around a kill, while they're waiting for their hunk of meat. Now a study in the journal BMC Ecology says the chuckles may communicate things like age, identity and ___2___. Which is important stuff for figuring out who gets the tastiest cut of zebra.
Researchers studied a clan of spotted hyenas living in a sanctuary behind the U.C. Berkeley campus. They ___3___ 17 hungry hyenas with bones or pieces of meat, and recorded about 250 bouts of giggling. Then they ran those sound bites through various computer algorithms, running statistical analyses and ___4___ spectrograms.
The result? They say a giggle's pitch and timbre establish a hyena's identity, and that pitch indicates age. But the giggle also tells you who's boss. A relatively monotone giggle [hyena sound] and you're first to the meat. A more erratic, variable giggle? [Hyena sound] Get back in line.
The researchers next plan to study hyenas in the wild. ___5___.
giggle
social status
enticed
drawing up
Just for laughs.
斑鬣狗愛打呼，愛低吼。大家都知道這些斑鬣狗為什么出名啦（斑鬣狗“笑聲”），那它們到底在“笑”些什么呢？
實地調(diào)查研究人員發(fā)現(xiàn)，鬣狗在盼望著瓜分獵物的同時會圍繞著獵物“傻笑”?！禕MC生態(tài)學》的一項調(diào)查表明這種笑聲可以傳達出年齡、身份、地位等一系列信息。這些信息是決定誰可以得到最美味的斑馬肉的重要依據(jù)。
研究人員研究了加州伯克利分校后的保護區(qū)內(nèi)的一群鬣狗。他們用肉骨頭和肉引誘17頭餓鬣狗，并由此錄下了大約250次的“笑聲”。然后他們對這些音頻進行了電腦計算，數(shù)據(jù)分析，并擬出了聲譜圖。
那結(jié)果如何呢？研究人員稱，“笑聲”的音高和音質(zhì)決定了該鬣狗的身份，從音高還能判斷出鬣狗的年齡。而且，這個“笑聲”還能告訴你誰是頭子。如果“笑聲”聲調(diào)單一平穩(wěn)，那么您先請~如果“笑聲”顫顫巍巍呢？那不好意思了，你就靠邊站吧~
這幫子研究人員下一步準備研究在野外生存的鬣狗——只為博一笑。