TY  - DATA
ED  - Discovery Channel School
ED  - Discovery Communications Inc.
TI  - Sound
PY  - 2003///
CY  - [Bethesda, Md.]
PB  - Discovery Communications Inc.
KW  - Sound
KW  - Juvenile literature
N1  - Teacher's guide in PDF and Microsoft Word format
N2  - This cd-rom introduces the concept of sound waves, how we hear, and rythm, illustrated technological advances that aid the hearing impaired, features Noise Cancellation Technologies company, explores the inner workings of a piano and secret sound found in nature
ER  -