Download Light Energy Sound Energy Fill out the Venn Diagram

Fill out the Venn Diagram Sound Energy Light Energy List at Least 3 characteris4cs List at least 3 characteris4cs List at Least 3 characteris4cs SOUND ENERGY SOLID STEAM Unit with The Sheldon Concert Hall What is sound?
•  Sound is ! A form of energy made by vibra4ons. ! When an object vibrates it causes the air parAcles around it to move. ! These parAcles bump into parAcles close to them and this conAnues unAl they run out of energy. You can not o
nly h
ear t
he s
ound, Try this… but you can feel the vibra4on inside your throat.   Put your finger on your neck and say “aah” as loud as you can.   Now say it as soI as you can. How does sound travel? •  Sound travels through all forms of maHer— gases, liquids and solid. •  These are called the medium. •  Sound cannot travel through a vacuum. What is pitch? "  Pitch is how high or how low a sound is. "  This is a high pitched sound. " This is a low pitched sound. Slugger Ms. Byrne’s Dog How does sound travel? Sound passes through the medium as longitudinal waves. High P
itch When the vibraAons are fast you hear a high pitch. When they
are slow, you hear a low pitch. Low Pitch Oscilloscope If we turn up the volume we see that the oscilla4ons become larger in the louder The higher the amplitude, the louder the sound. The lower the amplitude the soMer the sound. Are you keeping up? LEARNING CHECK No 1 The arrow represents… What is the period? T (Period) = the number of seconds per oscilla4on •  Period= the Ame it takes a molecule to oscillate back and forth one Ame. What is frequency?   Pitch i s d etermined b y frequency.   Pitch i s a m easure o f h ow h igh or l ow a s ound i s a nd d epends on t he s ound w ave’s frequency. What is frequency? •  Frequency is the number of oscillaAons per second. •  f = 1 T •  1 = hertz (Hz) T •  Humans hear sound waves in a limited frequency range. •  The human ear can hear sounds from 20-­‐20,000 Hz. •  Any sound below that frequency range is called infrasound. •  Any sound above that frequency range is called ultrasound Can you hear this? Homework
Option 1: Try the hearing test on
three participants (of varying
ages) . Record age and frequencies
at which he/she could hear.
Option 2: Write a one paragraph
prediction about why you think that
the range at which humans can
hear decreases with age.
Are you keeping up? 1. 
LEARNING CHECK No 2 1.  Frequency = Define the term A.  Is the number of oscilla4ons per second B.  the number of seconds per oscilla4on C.  Ranges from 20 Hz to 20,000 Hz What is the wavelength? 1.  Define the term What is the wavelength? 1.  Define the term The Speed of Sound or the Speed of the Distrubance How do we hear? How do we hear? How do we hear? The external ear, or pinna, is made of carAlage and soM Assue and “collects” sound. How do we hear? The ear canal, measures an inch long and goes all the way from the pinna to the tympanic membrane, or eardrum. The ear canal is a natural resonator, meaning it makes sounds louder, deeper, and clearer. How do we hear? VibraAons come through the ear canal And ulAmately cause the tympanic membrane to vibrate. These vibraAons are passed on to the ossicles How do we hear? The eustachian tube sits between the middle ear and the back of the throat. When the eustachian tube opens, it equalizes the air pressure. This is important for sound going through the middle ear. In children, the eustachian tube is flat, which contributes to ear infecAons. How do we hear? Tthe cochlea, plays an important role in hearing .The cochlea is coiled and shaped like a seashell. . It is also filled with fluid. When the ossicles vibrate, they push a membrane-­‐covered hole between the middle ear and the inner ear, called the oval window, which makes the cochlear fluid move Movement of the cochlear fluid affects hair cells. The hair cells respond according to what sounds come in to the ear, creaAng signals that become nerve impulses. . These nerve impulses are carried to the brainstem by the acousAc nerve to auditory processing centers within the brain (auditory cortex) How do we hear? The inner ear has two parts. The other, the cochlea, plays an important role in hearing .The cochlea is coiled and shaped like a seashell. It is also filled with fluid. When the ossicles vibrate, they push a membrane-­‐covered hole between the middle ear and the inner ear, called the oval window, which makes the cochlear fluid move .Movement of the cochlear fluid affects hair cells. The hair cells respond according to what sounds come in to the ear, creaAng signals that become nerve impulses. These nerve impulses are carried to the brainstem by the acousAc nerve to auditory processing centers within the brain (auditory cortex) Exit Ticket I wonder if you were listening…. 1. Name the bones in the middle ear. 2. What is the frequency range of human hearing?