science

To produce sound, an object must be ____.

• moving toward the listener
• vibrating
• heated
• in a gas

You produce speech by vibration of the ____.

• throat bones
• skin
• lips
• vocal cords

____ is the human perception of the energy a wave carries.

• loudness
• speech
• wave
• frequency

Hearing damage begins to occur at sound levels of about ____ decibels.

• 25
• 65
• 85
• 125

____ is made of sounds that are irregular and disorganized.

• doppler effcet
• loudness
• noise
• music

To produce sound, an object must be ____.

• moving toward the listener
• vibrating
• heated
• in a gas

You produce speech by vibration of the ____.

• throat bones
• skin
• lips
• vocal cords

____ is the human perception of the energy a wave carries.

• loudness
• speech
• wave
• frequency

Hearing damage begins to occur at sound levels of about ____ decibels.

• 25
• 65
• 85
• 125

____ is made of sounds that are irregular and disorganized.

• doppler effcet
• loudness
• noise
• music