Sound Intensity and Frequency Concepts

The video tutorial explains the characteristics of sound, focusing on loudness and pitch. Loudness is described as a measure of sound intensity, measured in decibels, with examples of common sound levels. The relationship between intensity and amplitude is explored, showing that intensity is proportional to the square of amplitude. The concept of pitch is introduced, explaining how it relates to frequency, with demonstrations of different frequencies to illustrate changes in pitch. The video also discusses how age affects the range of audible frequencies.

What is the unit used to measure loudness?

• Decibels

• Lumens

• Hertz

• Watts

Which of the following sound levels is considered deafening?

• 0 dB

• 120 dB

• 70 dB

• 60 dB

What happens to intensity when amplitude increases?

• It decreases

• It increases

• It becomes zero

• It remains the same

If the amplitude of a sound wave is doubled, how does the intensity change?

• It doubles

• It triples

• It remains unchanged

• It quadruples

What is the relationship between intensity and amplitude?

• Intensity is proportional to amplitude

• Intensity is proportional to the square of amplitude

• Intensity is inversely proportional to amplitude

• Intensity is unrelated to amplitude

What characteristic of sound does pitch describe?

• Loudness

• Intensity

• Frequency

• Duration

A low pitch sound is associated with which type of frequency?

• Low frequency

• Variable frequency

• High frequency

• Medium frequency

What frequency range is typically audible to humans?

• 50 to 18,000 Hz

• 100 to 15,000 Hz

• 20 to 20,000 Hz

• 0 to 10,000 Hz

Why might older adults have difficulty hearing high-frequency sounds?

• They are more sensitive to low frequencies

• Their hearing range shrinks

• They have better hearing overall

• Their hearing range expands

What is the effect of increasing frequency on the pitch of a sound?

• It makes the sound quieter

• It lowers the pitch

• It has no effect

• It raises the pitch