Sound: Pitch and Frequency

The video tutorial explains how sound frequency affects the differences in sounds, such as those made by animals, and introduces the concept of pitch. It describes how pitch is related to frequency and demonstrates this using a piano. The tutorial also covers the human hearing range, the measurement of frequency in hertz, and the ability of some animals to hear ultrasonic sounds. Applications of ultrasonic waves, such as sonar, are discussed, along with infrasonic waves and their examples.

What determines the pitch of a sound?

• The duration of the sound

• The speed of the sound wave

• The frequency of the sound wave

• The volume of the sound

Which unit is used to measure the frequency of sound waves?

• Hertz

• Watts

• Meters

• Decibels

What is the range of frequencies that the average human ear can detect?

• 40 to 40,000 hertz

• 20 to 20,000 hertz

• 30 to 30,000 hertz

• 10 to 10,000 hertz

What are sounds called that have frequencies above 20,000 hertz?

• Subsonic sounds

• Infrasonic sounds

• Ultrasonic sounds

• Supersonic sounds

What type of sound waves are produced when you swing your arms back and forth?

• Infrasonic waves

• Ultrasonic waves

• Supersonic waves

• Subsonic waves