Sound and Acoustics

Fill in the blank: _______ is the unit that measures loudness.

• Decibels

• Hertz

• Watts

• Lumens

Fill in the blank: _______ is sound with frequencies too low for human hearing.

• Subsonic

• Ultrasonic

• Supersonic

• Hypersonic

Fill in the blank: Sound travels through this medium: _______.

• Gas

• Liquid

• Solid

• Vacuum

The use of underwater sound waves to detect objects is called:

• Sonar

• Radar

• Lidar

• Ultrasound

High frequency sound waves used in medicine, during pregnancy, are called:

• X-rays

• Ultrasound

• MRI

• CT scan

The study of sound is called:

• Acoustics

• Optics

• Thermodynamics

• Kinetics

The term for the frequency at which every instrument will vibrate is called:

• Resonant frequency

• Harmonic frequency

• Fundamental frequency

• Natural frequency

The position of the image in a plane mirror is:

• Any

• Fixed

• Variable

• Random

Fill in the blank: The orientation of the image in a plane mirror is _______.

• Up

• Down

• Left

• Right

Fill in the blank: The image type for a concave mirror within focal length is _______.

• Virtual

• Real

• Inverted

• Magnified