The document discusses sound and its characteristics. It lists the members of group CONVETTI 8-3 as Annisa, Fadhil, Reyhan, Priska, and Rafi. It defines sound as a product of an oscillating object that can propagate through a medium as a mechanical wave. It provides examples of sound sources and discusses how loudness depends on amplitude, oscillation, and distance. The medium can be solid, liquid, or gas. It also gives the formula for sound propagation velocity and provides a sample question calculating distance from time and velocity.

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!