1. Wed. Mar. 12 Do Now: What kind of wave is a sound wave?
What unit is used to measure wavelength?
What unit is used to measure frequency?

2. Learning Intentions Students will be able to:
Explain the properties of sound and the ways they are measured
Compare and contrast the different properties of sound including pitch, frequency, and loudness
Success Criteria –
We will know we are successful when we can accurately determine the range of frequency of our hearing

3. What is a sound wave?
Sound waves are pressure waves with alternating high and low pressure regions.
Longitudinal wave

5. Reminder: What is wavelength?
Wavelength is the distance of one wave cycle
What is the unit for wavelength? __________

6. The wavelength of sound
Wavelength is also important to sound.
Musical instruments use the wavelength of a sound to create different frequencies.

7. Reminder: What is Frequency?
The number of wavelengths that pass a given point in one second
What is the unit for frequency? ____________

8. Other Properties of Sound
Pitch: a measure of how high or low a sound is perceived to be, depending on the frequency of the sound wave

9. When the frequency increases, the pitch gets higher.
When the frequency decreases, the pitch, gets lower.

10. Loudness: a measure of how well a sound can be heard
Decibel (dB): the most common unit used to measure loudness

11. Reminder: What is amplitude?
The measurement on a wave from the middle line to the crest or the middle line to the trough
What is the unit for amplitude? ____________

12. Volume: the amplitude of a sound wave or the amount of energy it has

13. Too much amplitude, or volume is a dangerous thing.

14. Range of Sound
About 35 – 50 dB is an average speaking volume.
About 10 dB is a whisper.
Anything over 80 dB, like a dance club or gun shot, can cause hearing damage.

15. Decibel levels of common sounds
Softest sounds you can hear 20
whisper 25
purring cat 50
normal conversation 80
vacuum, truck traffic
100
chain saw
115
rock concert, car horn
120
this sound hurts
140
jet engine 30 m away
200
rocket engine 50 m away

16. How loud is too loud?!
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17. Practice: Perception of Sound Activity
Determine group Low, Medium, High and Very High Frequency
Find range of frequencies for each group member
Write the definition of the vocabulary words we learned today:
Pitch
Decibel
Loudness
Volume

18. Do Now Mon. Mar. 10
Brainstorm: What do you know about sound?

19. Objectives Learning Intentions: Students will be able to:
Identify the major parts of the human ear
Describe the process that allows humans to hear sound
Success Criteria
We will know we are successful when we can accurately label the major parts of an ear diagram and explain the function of each

20. Detecting Sound Your ears are awesome! What do your ears do?
They change sounds waves into electrical signals that allow you to hear

21. Sound perception and music
When you hear a sound, the nerves in your ear respond to more than 15,000 different frequencies at once.
The brain makes sense of complex sound because the ear separates the sound into different frequencies.

22. There are several parts to the human ear.

23. Ear Lobe

24. Outer Ear The outer ear is just like a funnel!
Collects sound waves and directs them into the ear canal

25. Middle Ear
3 bones act as levers and increase the size of the vibrations.
Hammer
Anvil
Stirrup

26. Inner Ear
Sound vibrations are then turned into electrical signals and sent to the brain
Semicircular canals responsible for balance

27. Steps for processing sound:
There are 7 main steps for sound waves to travel through the ear and be processed as sound

28. 1.Ear lobe bounces sound waves into the ear canal.

29. 2. Ear canal directs sound to the inner ear.

30. 3. Ear drum is a thin tissue
3. Ear drum is a thin tissue. Compressions of sound waves cause it to vibrate.

31. 4. The hammer is connected to the ear drum
4. The hammer is connected to the ear drum. When the drum moves, the hammer moves.

32. 5. When the hammer moves, it bumps the anvil.

33. 6. The anvil is connected to the stirrup so it vibrates with the anvil.

34. 7. The stirrup is then connected to the cochlea which turns vibrations into a signal for your brain.

35. Check For Understanding
What part of the ear is the anvil bone located in?
What part of the ear acts like a funnel?

36. Activity: Make your own diagram of the ear and the process of hearing
Options: flow chart, illustration any other method your creative heart desires
MUST INCLUDE:
Parts of the ear
Main functions of each part
Can use pre-made model but must add in the function of each part/ process of hearing

37. OR: Read the short reading about ears and hearing
Answer the questions that follow about hearing

38. Example: Pinna: gathers sound waves
Ear Canal: sound travels to middle ear
Eardrum: sound waves hit the eardrum and cause it to vibrate
Hammer: vibrations amplified
Anvil: vibrations amplified
Stirrup: vibrations amplified and sent to cochlea
Cochlea: detects frequency and sends signal to brain through nerve

39. Tues. Mar. 9 Do Now: Label the following parts of the ear

40. A= _____________________________________
B= _____________________________________
C= _____________________________________
D= _____________________________________
E= _____________________________________
F= _____________________________________
G= _____________________________________
H= _____________________________________
J= _____________________________________
K= _____________________________________
I= ______________________________________

41. Objectives: Success Criteria –
Learning Intentions – Students will be able to:
Explain the process of how humans perceive sound and the problems that can effect the process
Success Criteria –
We will know we are successful when we can accurately

43. Questions to consider:
What part of the ear is the eardrum in?
There is liquid inside what pat of the inner ear?
What does the bending of the tiny hairs cause?

44. Hearing Loss and Deafness
If any part of the ear is damaged or does not work correctly, hearing loss or deafness may occur
Tinnitus is a common form of hearing loss
Happens after a long exposure to loud sounds
The sounds damage the hairs in the cochlea, which do not grow back
Permanent hearing loss results

45. Protecting Your Hearing!
Short exposure to painful loud sounds can cause damage
Loud sounds over a long period of time can cause damage
Wear earplugs when by loud sound
LOWER your headphone volume!

46. Independent Practice Auditory Acuity Sound localization
How far away can you hear a jingle bell?
Sound localization
Can you guess how far away sound is coming from?
Complete back side for homework!