Featured Research

from universities, journals, and other organizations

The Secret Of A Tiger's Roar

Date:
December 29, 2000
Source:
American Institute of Physics -- Inside Science News Service
Summary:
Researchers may have found the key to the intimidating and paralyzing affect that a tiger's roar has on animals, including humans. New research by bioacousticians shows that very low frequency sounds may be the key.

A tiger's intimidating roar has the power to paralyze the animal that hears it and that even includes experienced human trainers. Elizabeth von Muggenthaler, a bioacoustician from the Fauna Communications Research Institute in North Carolina, presented her research at the Acoustical Society of America meeting in Newport Beach, California on December 7. Bioacoustics is the study of the frequency or pitch, loudness, and duration of animal sounds to learn about an animal's behavior. At the meeting, von Muggenthaler discussed her work analyzing the frequency of tiger sounds to better understand the part of a tiger's roar that we can feel, but can't hear.

Why study something that we can't hear?

"Humans can only hear some of the sounds that tigers use to communicate," says von Muggenthaler. "Humans can hear frequencies from 20 hertz to 20,000 hertz, but whales, elephants, rhinos, and tigers can produce sounds below 20 hertz." This low-pitched sound, called "infrasound," can travel long distances permeating buildings, cutting through dense forests, and even passing through mountains. The lower the frequency, the farther the distance the sound can travel. Scientists believe that infrasound is the missing link in studying tiger communication.

In the first study of its kind, von Muggenthaler and her colleagues recorded every growl, hiss, chuff, and roar of twenty-four tigers at the Carnivore Preservation Trust in Pittsboro, North Carolina, and the Riverbanks Zoological Park in Columbia, South Carolina. Bioacousticians found that tigers can create sounds at about 18 hertz and when tigers roar they can create frequencies significantly below this. "When a tiger roars-the sound will rattle and paralyze you," says von Muggenthaler. "Although untested, we suspect that this is caused by the low frequencies and loudness of the sound."

When the researchers played back a tape of recorded tiger sounds including audible and infrasounds, the tigers appeared to react to these sounds. Sometimes they would roar and leap towards the speakers and sometimes sneak away. The next step for von Muggenthaler is to take the recorded infrasounds to scientists who can determine whether or not tigers can hear the infrasounds. Von Muggenthaler hopes to learn more about tigers, protect them from extinction, and understand the unheard, paralyzing power in their roar.


Story Source:

The above story is based on materials provided by American Institute of Physics -- Inside Science News Service. Note: Materials may be edited for content and length.


Cite This Page:

American Institute of Physics -- Inside Science News Service. "The Secret Of A Tiger's Roar." ScienceDaily. ScienceDaily, 29 December 2000. <www.sciencedaily.com/releases/2000/12/001201152406.htm>.
American Institute of Physics -- Inside Science News Service. (2000, December 29). The Secret Of A Tiger's Roar. ScienceDaily. Retrieved October 2, 2014 from www.sciencedaily.com/releases/2000/12/001201152406.htm
American Institute of Physics -- Inside Science News Service. "The Secret Of A Tiger's Roar." ScienceDaily. www.sciencedaily.com/releases/2000/12/001201152406.htm (accessed October 2, 2014).

Share This



More Plants & Animals News

Thursday, October 2, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Dolphins and Turtles Under Threat in Pakistan

Dolphins and Turtles Under Threat in Pakistan

AFP (Oct. 2, 2014) — The turtles and Dolphins of Pakistan's Indus river - both protected by law - are in a fight for their survival as man's activities threatens their futures. Duration: 02:29 Video provided by AFP
Powered by NewsLook.com
'Harvest Break' Endures in Maine Potato Fields

'Harvest Break' Endures in Maine Potato Fields

AP (Oct. 2, 2014) — Educators and farmers are clinging to a tradition aimed at giving farmers much-needed help in getting potatoes out of the fields and into storage before the ground freezes in the nation's northeast corner. (Oct. 2) Video provided by AP
Powered by NewsLook.com
Attacking Superbugs

Attacking Superbugs

Ivanhoe (Oct. 1, 2014) — Two weapons hospitals can use to attack superbugs. Scientists in Ireland created a new gel resistant to superbugs, and a robot that can disinfect a room in minutes. Video provided by Ivanhoe
Powered by NewsLook.com
Cultural Learning In Wild Chimps Observed For The First Time

Cultural Learning In Wild Chimps Observed For The First Time

Newsy (Oct. 1, 2014) — Cultural transmission — the passing of knowledge from one animal to another — has been caught on camera with chimps teaching other chimps. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins