Changing the Volume and Pitch of Sound

ONLINE CLASS EXPECTATIONS

Be on time – Join class promptly and prepared.

Turn your camera on – Stay visible and engaged.

Raise your hand to speak – Wait for your turn.

Mute when not speaking – Avoid background noise.

Participate in discussions – Share ideas respectfully.

Stay focused – Avoid distractions.

Follow instructions – Complete tasks and ask questions if needed.

Changing the VOLUME and PITCH of SOUND

LEARNING OBJECTIVES

• Describe sounds in terms of high or low pitch and loud or quiet volume.

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• Investigate how to change the volume and pitch of sounds.​

Changing the VOLUME of SOUND

How can we make








sound louder?​

How can we make sound louder?​

• Use a sound system:

  • A microphone picks up the sound.

  • An amplifier makes the sound stronger.

  • A loudspeaker makes the sound louder so everyone can hear.

  • Sound systems are used in CD players, TVs, and concerts.

• Play harder:

  • Hit or blow harder on the object that makes the sound (e.g., hit a drum harder or blow harder into a flute).

How can we make








sound quieter?​

How can we make sound quieter?​

• Too much noise, like traffic or loud music, is called noise pollution.

• Noise pollution is harmful and makes people uncomfortable.

• The best way to make sound quieter is to reduce the volume.

• If you can’t reduce the volume, you can muffle the sound.

• Muffling means making the sound softer so it doesn’t bother us as much.

Multiple Choice

What does a microphone do in a sound system?

• Makes the sound louder

• Picks up the sound

• Reduces the sound

• Plays music

Multiple Choice

What is the job of an amplifier?

• Makes the sound quieter

• Makes the sound stronger

• Turns sound into light

• Stops the sound

Multiple Choice

Which part of a sound system makes the sound louder so everyone can hear?

• Microphone

• Amplifier

• Loudspeaker

• Earphones

Multiple Choice

Where are sound systems commonly used?

• In books and newspapers

• In CD players, TVs, and concerts

• In refrigerators and ovens

• In cars only

Multiple Choice

What is a simple way to make sound louder without a sound system?

• Hit or blow softer

• Use ear defenders

• Turn off the object

• Hit or blow harder on the object that makes the sound

Multiple Choice

What is too much noise, like traffic or loud music, called?

• Sound pollution

• Noise pollution

• Air pollution

• Volume pollution

Multiple Choice

Why is noise pollution harmful?

• It makes music better

• It makes people uncomfortable

• It makes cars faster

• It helps us sleep

Multiple Choice

What is the best way to make sound quieter?

• Increase the volume

• Reduce the volume

• Add more speakers

• Play harder

Multiple Choice

What does muffling a sound mean?

• Making the sound louder

• Blocking the sound completely

• Turning the sound into music

• Making the sound softer so it doesn’t bother us

Multiple Choice

If you can’t reduce the volume, what can you do?

• Make the sound louder

• Muffle the sound

• Ignore the sound

• Remove the source

ways to








muffle sound

​

ways to muffle sound

• Loud sounds can hurt our ears.

• People in noisy places wear ear defenders to protect their ears. Ear defenders muffle sound.

• Every sound comes from something that vibrates, like a machine or a voice.

• To make buildings quieter:

  • Use carpets and curtains to absorb noise.

  • Fill walls with special materials to stop sound from passing through.

• Vehicles like cars and motorbikes have silencers to make engine sounds quieter.

Multiple Choice

Why do people wear ear defenders in noisy places?

• To make sounds louder

• To hear better

• To protect their ears by muffling sound

• To block vibrations completely

Multiple Choice

Where does every sound come from?

• Something that shines

• Something that vibrates

• Something that moves slowly

• Something that absorbs noise

Multiple Choice

How can we make buildings quieter?

• Use carpets, curtains, and special materials in walls

• Use more windows

• Remove furniture

• Paint the walls

Changing the pitch of SOUND

HOW TO CHANGE THE PITCH OF STRINGED INSTRUMENT?

HOW TO CHANGE THE PITCH OF STRINGED INSTRUMENT?



-You can also make the strings shorter by

pressing them down. These actions change the pitch of the notes.

HOW TO CHANGE THE PITCH OF WIND INSTRUMENT?

HOW TO CHANGE THE PITCH OF WIND INSTRUMENT?

To change the pitch of sound on a wind instrument you have to block one or more of the holes so that the column of air inside the pipe is shorter or longer.

Multiple Choice

What is pitch?

• How loud or soft a sound is.

• How high or low sound is.

• When you throw a baseball.

• The sound that you hear.

Multiple Choice

What is volume?

• How loud or soft a sound is.

• How high or low sound is.

• When you throw a baseball.

• The sound that you hear.

Multiple Choice

If we describe a sound as loud, we are describing the ________.

• pitch

• volume

• noise

• vibrations

Multiple Choice

 If we are describing how low or high a sound is, we are describing the ______.

• noise

• pitch

• volume

• waves

Multiple Choice

What is the unit of sound?

• decibel

•  sound level meter

• meter

• liter

Multiple Choice

What instrument is used to measure sound?

• decibel

• sound level meter

• measuring tape

• meter tape

Multiple Choice

The highest pitch is made by the _______ instrument.

• biggest
• wooden
• smallest
• shiniest

Multiple Choice

Airport ground staffs use ____________ to prevent ear damage from excessive aircraft noise.

• ear plugs

• ear protectors

• a head scarf

• a helmet

Multiple Choice

Why is the school library covered with carpet?

• So everyone can make a lot of noise
• to help absorb sounds to keep it quiet
• because it looks good
• to help absorb sounds so it can stay noisy

Multiple Choice

What effect is produced by plucking a thin rubber band that has been pulled tightly?

• The rubber band will vibrate slower and produced a lower pitch.
• The sound you hear will increase in volume if the rubber band is pulled tightly.
• Sound waves will be absorbed by your hand when you pluck the rubber band.
• The rubber band will vibrate faster and produce a higher pitch.

Multiple Choice

__________________________ is the back-and-forth motion of an object.

• vibration
• sound wave
• frequency
• amplitude

Multiple Choice

What happens to a guitar string as you tighten it?

• The sound made when plucked gets lower in pitch

• The sound made when plucked gets higher in pitch

• The sound made when plucked stays the same

Multiple Choice

The softer you hit a drum ...

• the quieter the sound

• the lower the pitch of the sound

• the higher the pitch of the sound