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The Case of the Barking Dog, Episode 4

Students experiment to block high-frequency sounds

Product Type: Video Learning Clip
Audience: Educators, Students
Grade Levels: K-8
Year: 2000
Subjects: General Science


This NASA video segment explores how different frequencies of sound travel. The segment is part of the NASA SCIFiles program, which features the Tree House Detectives, a group of young students who work together to solve everyday problems. In this segment, the detectives gather information about sound to hypothesize why dogs are barking throughout their town. The detectives visit a scientist who explains how animals use high-frequency sounds to detect prey and that high-frequency sounds do not travel far. A demonstration shows that high-frequency sounds are easier to block than low-frequency sounds. The detectives draw a conclusion about what is causing the dogs to bark.

The Case of the Barking Dog, Episode 4
Duration: 15 minutes 03 seconds
> View QuickTime [50MB]


Other video learning clips in this series:
The Case of the Barking Dog, Episode 1
The Case of the Barking Dog, Episode 2
The Case of the Barking Dog, Episode 3
Problem-Solving Using the Scientific Method
Investigating the Properties of Sound
Following the Scientific Method: Collecting, Organizing and Analyzing Data
Our Ears and How They Work
The Effect of Sound Levels on the Human Ear
The Hearing Ability of Dogs
NASA's Anechoic Chamber for Sound Research
Experimenting With Echoes
Variables That Affect the Speed of Sound
Understanding Sonic Booms
How and Why Bats Use High- Frequency Sounds to Navigate
Demonstrating the Difference Between High- and Low-Frequency Sounds

Page Last Updated: December 15th, 2014
Page Editor: Flint Wild