USEFUL AND HARMFUL SOUND

USEFUL AND HARMFUL SOUND

Poll

How many of you like the sound comes from the activity in this picture?

Open Ended

Why do you like listening to the music? Type your reason.

Open Ended

Why you don't like the sound that comes from the drilling? Type your reason.

USEFUL and HARMFUL SOUND

Sound has many effects in our lives.

It can be useful or harmful to us.

Do you know?

The unit for measuring the loudness of sound is decibel (dB).

Noise that has loudness exceeds /more than 85dB can damage our hearing.

Look for the sound that is exceeding 85dB

USEFUL SOUND

1. Sound allows us to communicate.

2. Musical sound can be entertaining.

3. The siren of an ambulance indicates an emergency alert.

4. The ringing of a telephone provides notification on incoming calls or messages.

Multiple Choice

Which one is an entertaining sound?

Multiple Choice

Which one shows notification sound?

Multiple Select

Which sound indicates emergency alerts? There's more than one answer.

Open Ended

What other sound that you love to listen to? Type your answer.

HARMFUL SOUND

• A noisy environment makes us difficult to communicate.

• Noises from vehicles and construction sites can cause disturbance and stress.

Multiple Select

Which ones can makes us difficult to communicate? There's more than one answer.

Poll

How do you feel when your surrounding is too noisy?

• happy

• stress

• no feeling

SOUND POLLUTION is a frequently or excessively loud noise.

(Bunyi bising yang kerap dan berlebihan)

This type of noise can pollute our ears and DAMAGE our hearing.

Therefore, we need to reduce the sound pollution.

There are some ways we can reduce sound pollution.

airport ground staff use ear protectors to prevent ear damage from excessive aircraft noise

many types of ear protectors

Use sound absorbers such as soft boards

Use curtains as sound absorber.

Use carpets as sound absorber.

Room with many windows can reduce sound vibration.

Plant trees as sound barriers to reduce noise pollution from the passing vehicles.

Open Ended

How do you reduce sound pollution at your house? Type your answer.

Multiple Select

What did you learn today?

• useful sound

• harmful sound

• what very loud noise can do to our ear

• how to reduce noise pollution

Poll

Do you like today's lesson?

• Yes

• No

• I don't understand