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2. …Group Members…
• Annisa
• Fadhil
• Reyhan
• Priska
• Rafi
(PART OF CONVETTI 8-3)

3. SoundSound
Sound is a product ofSound is a product of
anan oscillating object.oscillating object.
Oscillating objectsOscillating objects
which produce soundwhich produce sound
are called soundare called sound
source. As asource. As a
mechanical wave,mechanical wave,
sound can onlysound can only
propagate through apropagate through a
medium.medium.

4. Characteristic Of SoundCharacteristic Of Sound
 It originated from an oscillating objectIt originated from an oscillating object
 It propagates through air in the form of longitudinalIt propagates through air in the form of longitudinal
wavewave
 It needs a mediumIt needs a medium
to propagateto propagate
 It reflect if it hits aIt reflect if it hits a
barrier wallbarrier wall

5. Examples Of Sound
 Musical sound
 Motorize vehicle
sound
 The sound that you
produce when
communicating with
other person
Sound can be hear if there are 3 factors:
Sound source
Medium
Listener

6. Loudness Of Sound Depends On:
 Amplitude
 Oscillation
 Distance
The Medium That Needed:
 Solid
 Liquid
 Gas

7. SOUND PROPAGATIONSOUND PROPAGATION
VELOCITYVELOCITY
 V= VelocityV= Velocity
 S= DistanceS= Distance
 t= Timet= Time
s
vt

8. QUIZ!QUIZ!
Q: Thunder heard 4 seconds afterQ: Thunder heard 4 seconds after
lightening. Sound velocity is 40 m/s. whatlightening. Sound velocity is 40 m/s. what
is the distance of the lightning to theis the distance of the lightning to the
observer?observer?
Known:Known:
• T= 4 sT= 4 s
• V= 40 m/sV= 40 m/s
Ask: distance (S)Ask: distance (S)
Answer: S= v.tAnswer: S= v.t
S= 4 s.40 m/s: 160 mS= 4 s.40 m/s: 160 m

9. Thank You for Your
Attention!

10. Thank You for Your
Attention!