01_topic_01_introduction_to_acoustics_and_sound_waves.pdf

acoustics

2. Forces and Vibrations
Waves
Hearing Waves in Air

Toe Cee Geo aed Bie
Rei igi DRE RUSSE

tM Mn aaa

3. Forces and Vibrations
Waves
Hearing Waves in Air

De. ti Mn EEE

4. Forces and Vibrations
Waves
Hearing Waves in Air

What is Vibration?
Describing Vibrations

Current Section

Dr. Hilal M. El Misilmani Topic 01: Introduction to Acoustics $ Sound Waves 4/34

5. Hearing Waves in Air

ti Mon EEE

6. Forces and Vibrations

What is Vibration?

Dr. Hilal M. El Misilmani

What is Vibration?
Describing Vibrations

Vi) AAA
|

Topic 01: Introduction to Acoustics $ Sound Waves 6/34

7. Forces and Vibrations
Waves
Hearing Waves in Air

ti Mn DÉS

8. Forces and Vibrations What is Vibration?

Describing Vibrations

Vibrating Mass Attached to a Spring

Maximum E imum

lacement acement
| |
i

Frequency
cycles/s

Dr. Hilal M. El Misilmani Topic 01: Introduction to Acoustics $ Sound Waves 8/34

9. Forces and Vibrations What is Vibration?

6 Describing Vibrations

Vibrating Mass Attached to a Spring

AMAIA
AY
N MN PAN

hy
N
Y

à
y

À

$

Dr. Hilal M. El Misilmani Topic 01: Introduction to Acoustics $ Sound Waves 9/34

10. Forces and Vibrations
Waves
Hearing Waves in Air

Wave Types
Waves in Air

Current Section

(O Honing Weees la Ar
sets
e amd Velas
@ Belge sal Niece
o mera .
@ Enogy u Sound

Dr. Hilal M. El Misilmani Topic 01: Introduction to Acoustics $ Sound Waves 10/34

11. Forces and Vibrations
Waves

Wave Types
Waves in Air

Wave Types
0)
©

Dr. Hilal M. El Misilmani Topic 01: Introduction to Acoustics $ Sound Waves 11/34

12. Wave Types
Waves in Air

Waves

Waves in Air

©

Dr. Hilal M. El Misilmani Topic 01: Introduction to Acoustics $ Sound Waves 12/34

13. Wave Types

Waves Waves in Air

Waves in Air

Rarefactions

Average (equilibrium) distance

Raref action distance

— A —_ a -=—

Dr. Hilal M. El Misilmani Topic 01: Introduction to Acoustics $ Sound Waves 13/34

14. Forces and Vibrations
Waves
Hearing Waves in Air

tM Mn aaa

15. Wave Terms

Forces and Vibrations Sound Velocity
Waves Refraction and Reflection
Hearing Waves in Air Interference

Energy and Sound

Current Section

Dr. Hilal M. El Misilmani Topic 01: Introduction to Acoustics $ Sound Waves 15/34

16. Wave Terms

Forces and Vibrations Sound Velocity
Waves Refraction and Reflection
Hearing Waves in Air Interference

Energy and Sound

Waves in Air

cos ©

Dr. Hilal M. El Misilmani Topic 01: Introduction to Acoustics $ Sound Waves 16/34

17. Wave Terms

Forces and Vibrations Sound Velocity
Waves Refraction and Reflection
Hearing Waves in Air Interference

Energy and Sound

Waves in Air

Dr. Hilal M. El Misilmani Topic 01: Introduction to Acoustics $ Sound Waves 17/34

18. Wave Terms
t Sound Velocity
Refraction and Reflection
Hearing Waves in Air Interference
Energy and Sound

Hearing Sounds

Semicircular
“ canals

Middle Round
window

car
! Eardrum
Auditory

nal

Dr. Hilal M. El Misilmani Topic 01: Introduction to Acoustics $ Sound Waves 18/34

19. Wave Terms
t Sound Velocity
Refraction and Reflection
Hearing Waves in Air Interference
Energy and Sound

Hearing Sounds

The transfer function (frequency response) of the ear canal. This is a fixed component that is combined with
every directionally-encoded sound reaching the eardrum.

Dr. Hilal M. El Misilmani Topic 01: Introduction to Acoustics $ Sound Waves 19/34

20. Forces and Vibrations
Waves
Hearing Waves in Air

et Mon DÉS

21. Forces and Vibrations
Waves
Hearing Waves in Air

De. Hi Mon TT

22. Hearing Waves in Air

Wave Terms

me
lo repeal
itse*

Dr. Hilal M. El Misilmani

Wave Terms

Sound Velocity
Refraction and Reflection
Interference

Energy and Sound

Topic 01: Introduction to Acoustics $ Sound Waves 22/34

23. Forces and Vibrations
Waves
Hearing Waves in Air

Dr. Hilal M. El Misilmani [Topic 01: Introduction to Acoustics $ Sound Waves 23/34

24. Wave Terms

Forces and Vibrations Sound Velocity
Waves Refraction and Reflection
Hearing Waves in Air Interference

Energy and Sound

Sound Velocity

Dr. Hilal M. El Misilmani Topic 01: Introduction to Acoustics $ Sound Waves 24/34

25. Forces and Vibrations
Waves
Hearing Waves in Air

De. ti Mon a

26. Forces and Vibrations
Waves
Hearing Waves in Air

et Mon aaa

27. Wave Terms

orces and Vibration: Sound Velocity
Wave Refraction and Reflection
Hearing Waves in Air Interference

Energy and Sound

Sound Velocity

Dr. Hilal M. El Misilmani Topic 01: Introduction to Acoustics $ Sound Waves 27/34

28. Wave Terms
t Sound Velocity

ar Refraction and Reflection
Hearing Waves in Air Interference

Energy and Sound

Sound Velocity

o

Hot air Cool air
Faster sound speed
1

ARecciver Sow

Faster sound speed

(6)

Dr. Hilal M. El Misilmani Topic 01: Introduction to Acoustics $ Sound Waves 28/34

29. Forces and Vibrations
Waves
Hearing Waves in Air

tM Mon TT

30. Wave Terms

orces 1 Vibration: Sound Velocity
Wave Refraction and Reflection
Hearing Waves in Air Interference

Energy and Sound

Refraction and Reflection

= _ à me

Dı

. Hilal M. El Misilmani Topic 01: Introduction to Acoustics $ Sound Waves 30/34

31. Wave Terms
Sound Velocity

Wave Refraction and Reflection
Hearing Waves in Air Interference

Energy and Sound

Interference

©
©

Dı

. Hilal M. El Misilmani Topic 01: Introduction to Acoustics $ Sound Waves 31/34

32. Wave Terms
or 1 Vibrat Sound Velocity
Wave Refraction and Reflection
Hearing Waves in Air Interference

Energy and Sound

Energy and Sound

5

D:

. Hilal M. El Misilmani Topic 01: Introduction to Acoustics $ Sound Waves 32/34

33. Wave Terms

Sound Velocity
Refraction and Reflection
Hearing Waves in Air Interference

Energy and Sound

Energy and Sound

o mad Pegue

Topic 01: Introduction to Acoustics $ Sound Waves 33/34

Dr. Hilal M. El Misilmani

34. Wave Terms
t Sound Velocity

ar Refraction and Reflection
Hearing Waves in Air Interference

Energy and Sound

Standing Wave

Dr. Hilal M. El Misilmani

Topic 01: Introduction to Acoustics $ Sound Waves 34/34