Discussion about Effects of Temperature to Sounds

1. EFFECT OF TEMPERATURE
TO THE SPEED OF SOUND

2. VOCABULARY
It refers to the back-and-forth
movement of objects.
BRATNIOVI

3. VOCABULARY
It refers to the back-and-forth
movement of objects.
VIBRATION

4. VOCABULARY
It is produced when there are
vibrations.
DUNOS

5. VOCABULARY
It is produced when there are
vibrations.
SOUND

6. VOCABULARY
Material to which sound waves can
travel.
MIEDUM

7. VOCABULARY
Material to which sound waves can
travel.
MEDIUM

8. VOCABULARY
It is the ability of a material to
return to its original form after a
certain amount of force has been
applied to it.
LYECITIAST

9. VOCABULARY
It is the ability of a material to
return to its original form after a
certain amount of force has been
applied to it.
ELASTICITY

10. VOCABULARY
It is an intrinsic property that is
determined by the amount of mass
per area of space or volume of the
material.
NSDEYIT

11. VOCABULARY
It is an intrinsic property that is
determined by the amount of mass
per area of space or volume of the
material.
DENSITY

12. VOCABULARY
Described as the turning back of the
wave as it hits a barrier.
FLRCONTEEI

13. VOCABULARY
Described as the turning back of the
wave as it hits a barrier.
REFLECTION

14. VOCABULARY
It involves a change in the direction
of waves as they pass from one
medium to another.
RREAONFICT

15. VOCABULARY
It involves a change in the direction
of waves as they pass from one
medium to another.
REFRACTION

16. VOCABULARY
It refers to the multiple reflections
or echoes in a certain place.
ERRERBNAVEIOT

17. VOCABULARY
It refers to the multiple reflections
or echoes in a certain place.
REVERBERATION

18. SOUND
• It is a disturbance that carries energy and
travels through a medium.
• It is produced by vibrations in the medium
through which it travels.
• The medium can be solid, liquid or gas.

19. VIBRATIONS
• As you speak, these are produced by the vocal
cords inside the throat.
• You can hear the vibrations when sound
waves reach your ear.
• When an object vibrates, it creates sound
energy.

20. SOUND ENERGY
• It travels in the form of sound waves.
• These waves are examples of longitudinal
waves where the vibrations are parallel to the
direction of the wave.
• They are also known as mechanical waves
since sound waves need a medium in order to
propagate.

21. MEDIUM
• These media can either be solids, liquids or
gases.
• Sound waves travel fastest in solids and
slowest in gases.

22. DENSITY
• It refers to the ratio of mass and volume of a
substance.
• Denser objects have more mass per volume,
and they have more compact atoms and
molecules.
• Sound travels in denser materials provided
they have the same elastic properties.

23. ELASTICITY
• It is the tendency of a material to return to
its original shape after being deformed when
force is applied on it.
• Sound can travel faster through media with
higher elasticity than through low elasticity.
• Solids are more elastic than liquids and
gases. Thus, sound travels fastest in solids
and slowest in gases.

24. SPEED OF SOUND
• It refers to how fast the disturbance travels
in the medium.
• It is the distance that the disturbance travels
per unit of time.
• Its speed through the medium is affected by
some factors. One of the factors is
temperature.

25. SPEED OF SOUND
• When sound travels through dry air, its speed
increases by 0.6 m/s per 1˚C increase in
temperature.
• The speed of sound at a certain temperature
in the air can be computed using the formula:

26. SPEED OF SOUND
• v is the speed of sound in air
• 331 m/s is the speed of sound at 0˚C
• 0.6 m/s/˚C is the increase in speed of sound
per ˚C increase in temperature
• T is the temperature of air

27. Example
Problem 1: What is the speed of sound in air of
temperature 25˚C?

28. Example
Problem 2: What is the speed of sound in the air
if the temperature is 30˚C?

29. SOUND ENERGY
• It travels from one particle to another.
• With more collisions per unit time, sound
energy is transferred more efficiently, and
travel quickly.
• As the temperature increases, the particles
vibrate faster resulting to more collisions per
unit time.

30. SOUND WAVES
• The refraction of sound waves involves a
change in the direction of waves as they pass
from one medium to another.
• When a sound wave propagates in the air
with temperature which changes with
altitude, refraction happens.
• Sound waves travel slower in cooler air than
in warmer air.

31. SOUND WAVES
• The speed of sound is greater in hot air than
it is in cold air.
• Sound travels from hot air to cold air or from
cold air to hot air it will refract.
• Molecules of air are moving faster and the
vibrations of the sound wave can therefore be
transmitted faster.

32. SOUND WAVES
• Speed of sound is directly affected by the
temperature of the medium. The hotter the
medium, the faster the sound travels.

33. SOUND WAVES

34. SOUND WAVES

35. PROPERTIES OF SOUND
• A sound wave will undergo certain behavior
when it encounters the end of the medium or
an obstacle. Possible behavior includes
reflection and refraction.

36. REFLECTION
• The turning back of the wave as it hits a
barrier. The echo is an example of a reflected
sound
• Reverberation, on the other hand, refers to
multiple reflections or echoes in a certain
place.

37. REFLECTION
• This best fits the bathroom which enhances
the voice (Reverberation).
• In theaters and movie houses, there are also
reverberations and echoes. But these are not
pleasing to the ears during a play or a movie.
To lessen these, designers use curtains and
cloth covers for the chairs and carpets.

38. REFLECTION
• Another application of sound reflection is
echo sounding.
• This is used by scientists to map the seafloor
and to determine the depth of the ocean or
sea.
• This is just the same as how bats use sound
to detect distances.

39. REFRACTION
• The refraction of sound waves involves a
change in the direction of waves as they pass
from one medium to another.
• Sound waves travel slower in cooler air than
in warmer air.
• When a sound wave propagates in the air
with temperature which changes with
altitude, refraction happens.

40. REFRACTION
• Sound wave travels from air of higher
temperature to lower temperature.

41. Sound travels faster at the earth’s surface since the air molecules are hotter due to the
energy absorbed from the earth’s ground.

42. Sound travels faster at the higher altitude and is refracted or bent towards the ground.