Seat # ______Name ______Page 72
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What is Sound?
1. Click the rulers.
a. What do the rulers cause to vibrate? ______
b. We hear it as ______
c. The longer the ruler sticks out over the edge of the table, the ______the sound
2. Sound Waves
a. Sound is formed by ______
b. It is ______energy
Click “Show Me”
Click the wave
c. Air is pushed together at a higher pressure ______
d. And pulled apart at a lower pressure ______
e. These changes make ______waves
3. Pitch and Frequency
Click the Buttons
a. How do the waves change? ______
b. Another name for Pitch is ______
c. Frequency is measured in ______
d. The Frequency of a whistle is ______
The Frequency of a bass drum is ______
4. Loudness and Decibels
Click the Buttons
a. How do the waves change? ______
b. Loudness is measured in ______
c. What are the decibels of a Rock Concert? ______
What are the decibels of a normal conversation? ______
5. The Ear
a. Sound waves travel down the ______and cause the ______to vibrate.
b. ______in the Cochlea convert vibrations to electrical signals which are sent to the ______
Lesson 1: Sound Waves
1. Key Words:
a. Speed ______
b. Frequency ______
c. Wavelength ______
d. Longitudinal ______
e. Transverse ______
2. The wave is a ______that travels across the crowd
3. Do the people travel with the crowd? ______
4. Wave Types
a. What are the two main types of waves? ______& ______
5. Speed:
a. Waves travel at different ______
b. Ocean waves are slower than ______waves
c. How fast is sound? ______
d. How fast are radio waves? ______
6. Frequency:
a. Draw one complete wave:
b. How many waves passed in 5 seconds? ______
c. Frequency is ______/______
7. Wavelength:
a. What symbol do we use for wavelength? ______
b. What are the units? ______
c. The slower the ball; the ______the wavelength.
8. Longitudinal Wave (compression)
a. Longitudinal waves vibrate ______to the direction the wave travels.
b. What is an example of a longitudinal wave? ______
9. Transverse Wave
a. Transverse waves vibrate at ______to the direction the wave travels
b. What is an example of a transverse wave? ______
Lesson 2: Wave Equation
1. Wave Equation:
a. As frequency increases, wavelength ______
b. As speed increases, wavelength ______
c. What is the equation for speed? ______
d. What is the speed of a wave with frequency t 12022.5Hz and wavelength at 0.5m? ______
e. What is the speed of a wave with frequency t 3022.5Hz and wavelength at 0.5m? ______
f. What is the speed of a wave with frequency at 300Hz and a wavelength at 0.5m? ______
g. What is the speed of a wave with frequency at 500Hz and a wavelength at 0.8m? ______
2. Sound Transmission:
a. Sound waves travel quickly through a ______because particles are ______
b. Sound waves travel slowly through a ______because particles are ______
c. What is the speed of a wave with frequency at 300Hz and a wavelength at 1.5m? ______
d. What is the speed of a wave with frequency at 300Hz and a wavelength at 2.1m? ______
e. Diagram the equation as a triangle:______
f. What are the three equations: 1) ______2)______3)______
g. Sound has a velocity of 340m/s and a frequency of 2 kHz, what is the wavelength? ______
Lesson 3: Wave Behavior
1. Key Words:
a. Reflection is ______
b. Refraction is ______
c. Diffraction is ______
2. Reflection:
a. Two Laws of Reflection
i. The angle of ______equals the angle of ______
ii. The ______ray, the ______and the ______all lie in the same ______
3. Echoes:
a. What is an echo? ______
b. Fishing boats use echoes to detect ______and ______
c. What is this type of echo called? ______
d. What is the speed of sound in water? ______
e. How many seconds for the sound to reach the bottom? ______
f. What is the formula for speed? ______
g. How far away is the bottom? ______
h. What would happen if a school of fish swam under the boat? ______
4. Echoes in Use:
a. What is the distance? ______
b. What is the speed of sound? ______
c. What is the formula for speed? ______
d. What is the time delay before the echo is heard? ______
5. Refraction:
a. What happens to sound when it enters a denser material? ______
b. When waves change mediums, they change ______
c. What happens to the waves above in the shallower water? ______
d. They also change ______
6. Refraction:
a. When do trains sound louder? ______
b. During the day the sound is blocked by ______
c. Sound waves travel ______in cold air
d. The change in temperature causes the waves to ______over the buildings.
7. Diffraction:
a. You can hear someone around a corner before you ______them
b. Light has a ______wavelength so only ______objects can effect its ______
c. Sound waves can ______objects of ______to their wavelength.
8. Diffraction:
a. If the gap size equals wavelength, the diffraction ______and the wave ______