Musical Instruments create different sounds based on different parts of the instrument vibrating. Complete the following chart: String Instruments Vibrating Strings Examples (2): Violin Cello Woodwind Instruments Vibrating reed and air Examples (2): Flute clarinet Brass Instruments Vibrating airExamples (2): Trumpet Tuba Percussion Instruments Vibrating surface Examples (2): Drum Cymbals
Singers produce sound because their vocal cords vibrate. Click Above for Video Clip
Male singers tend to have deeper singing voices because their vocal cords are thicker and longer than female singers.
An oscilloscope is a machine that is used to show pictures of sound waves.
PITCH The pitch of a sound refers to how high or low the sound is. Pitch is related to the length of a wave. A high pitch produces a wave that has a short wavelength. The higher the pitch, the higher the frequency. A low pitch produces a wave that has a long wavelength. The lower the pitch, the lower the frequency. Frequency is measured in Hertz (Hz). PITCH (click on the word PITCH for video clip)PITCH
The shorter the string on an instrument, the higher the pitch. If the string is lengthened, the pitch will become lower.
VOLUME The volume of a sound refers to how loud or soft a sound is. Volume is related to the height of a wave. A loud volume produces a tall wave. The louder the volume, the greater the amount of energy being used. A soft volume produces a short wave. The softer the volume, the lower the amount of energy being used. Volume is measured in decibels (dB). VOLUME (click on the word VOLUME for video clip)VOLUME
Submarines use sonar to measure their depth in the ocean. Click Below for Video Clip
Sonar is a system that uses transmitted and reflected sound waves to learn how far away an object is in water.
A reflected sound wave is called an echo. Click Above for Video Clip
Materials that are hard and smooth are more likely to reflect sounds.
Materials that are soft and textured are more likely to absorb sounds.
Echolocation Bats and dolphins are just a few animals that use echolocation to communicate.