Loudness and Pitch

What is noise?

• Noise is sounds that we hear everyday.

• Noise is sounds that produced by people and things.

• Noise is unwanted sounds.

• Noise is collections of sounds.

The following are ear defenders to protect our ears, except...

• Earmuffs

• Earphone

• Ear plugs

The following are ways to keep out noise, except....

• Closing doors and windows

• Hanging curtains

• Reduce the volume

• Using carpets and soft cushions

The human ear can hear a minimum of ____Hz.

• 20 Hz

• 10 Hz

• 30 Hz

• 50 Hz

The human ear can hear up to ___________Hz

• 25.000 Hz

• 20.000 Hz

• 85.000 Hz

• 50.000 Hz

Ultrasound is _____________________. Meanwhile, Infrasound is _____________________.

• Sounds above 20.000 Hz; Sounds below 20 Hz

• Sounds below 20 Hz; Sounds above 20.000 Hz

• Sounds above 20.000 dB; Sounds below 20 dB

Generally, a small instrument produces a ______ pitch.

• high

• low

What is frequency?

• the number of vibrations per second

• the loudness or softness of a sound

• how high or low a sound is

• the back and forth movement of matter

What medium does sound travel fastest through?

• solid

• liquid

• gas

If a sound has a high amplitude then it also has a ____________

• fast echo

• high volume

• high pitch

• low volume