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What is this? KS3 starter Why is it not good for this? Image of vuvezela: Berndt Meyer © Snapshot Science, 2010Snapshot Science
The vuvezela is a horn that is popular at football matches in Africa. It creates a loud noise, but how loud? Loudness is measured in decibels (dB) KS3 Activity © Snapshot Science, 2010Snapshot Science faintmoderate loudvery loudpainful 020406080100120140160 dB whisper alarm clock lawnmower chainsaw conversation jet engine right next to the speakers at a rock concert Where do you think those go on the decibel scale above? a vuvezela
Sounds louder than 80 decibels are considered potentially dangerous. Hair cells in the inner ear and the hearing nerve can be damaged by loud sounds. This results in hearing loss. What advice would you give to people who are attending matches at the World Cup? © Snapshot Science, 2010Snapshot Science KS3 Activity
Here’s the word. What is the question? NOISE DECIBEL SOUND FREQUENCY PITCH HEARING EAR.
Thursday Turn in 2.3 Notes 2.4 Notes Egg vs Pop. Your Sense of Hearing.
Hearing and the Ear. Ear drum Semicircular canal Hammer, Anvil Stirrup Cochlea Nerve to brain Eustachian tube.
6 th Grade Objective 1.6. Objective 1.6 Summarize protective measures for ears and hearing.
HOW DO WE HEAR? Sound waves enter the ear… Amplified by an oval-shaped membrane called the ______________.
Sound Intensity Level – Learning Outcomes HL: Define sound intensity and give its unit. HL: Solve problems about sound intensity. Define threshold.
16.6 Noise Noise Noise pollution in Hong Kong road drilling jet plane taking off busy street traffic.
Lecture # 22 Audition, Audacity & Sound Editing Sound Representation.
Sound 3/27/15. Big Waves Video Big Waves: Ct1U&feature=related Ct1U&feature=related.
Noise-Induced Hearing Loss.
Properties of Sound Physical Science Ms. Pollock
What we will do today: State how me measure sound levels. State the unit of sound. Carry out experiments to find the sound levels of everyday occurrences.
Acoustics Waveform Frequency Intensity Resonance Sound Propagation.
Noise Pollution Noise & Our Hearing Level of Noise Measurement of Noise Classification of Noise Sources of noise Impacts of noise Control.
Chapter 13: Sound and Waves. Air Pressure Pressure: a measure of the force felt by the walls of the container holding the gas More molecules = more pressure.
Eardrum Sound waves hit a thin skin call the eardrum. The sound waves cause the eardrum to vibrate. Three Tiny Bones As the eardrum vibrates, it causes.
Sound waves and the Ear. Sound Sound travels in waves. We “hear” vibrations of molecules.
Sound is a longitudinal wave created by a vibrating object. Sound is a mechanical wave. PhET Simulation PhET Simulation Demo: Standing Sound Waves.
The Science Behind the iPod. YEAR MP3 players are few and far between- only ones available are large and clunky or small and not user friendly.
Hearing Aka: Audition. Frequency the number of complete wavelengths that pass through point at a given time. This determines the pitch of a sound.
What are some practical ways we use sound energy? The Human Ear.
TAKING CARE OF YOUR HEARING. Statement of Objective Students will learn how to protect ears from damage due to noise pollution. Students will continue.
Senses- Ears Hearing and balance are the main functions of hearing. Hearing works with the other 4 senses to aid us in obtaining information and keeping.
Hearing Our auditory sense We hear sound WAVES Frequency: the number of complete wavelengths that pass through point at a given time. This determines.
Sound. Sound Waves The origin of any sound is a vibrating object –Usually the frequency of the sound is the same as that of the vibrating object Frequency.
Hearing and The Ear.
Source Intensity Level # of Times Greater Than TOH Threshold of Hearing0 dB10 0 Rustling Leaves10 dB10 1 Whisper20 dB10 2 Normal Conversation60.
Noise and Old Ears by Jack Myers. 1 What is the meaning of the word decibel in paragraph 7 of the selection? Ο A. The loudest sound heard by human ears.
Bell Work Wavelength is to ______________ as ___________ is to brightness hue, intensity intensity, hue frequency, amplitude brightness, hue amplitude,
I can Hear you!!! The workings of the ear… A human version of a Rube golberg machine.
Listen Now, Hear Later The Center for Hearing and Speech Hearing Protection Program.
HEARING PROTECTION : A SOUND INVESTMENT. Hearing loss doesn’t just happen to the elderly. It can happen to YOU if you don’t protect your ears!
Chapter 21 – The Nature of Sound
What effects the volume? Two variables affect intensity in a perfect system (in reality the medium will absorb some of the sound, but we will ignore that)
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Sound What is ultrasound? What do we use it for?.
Properties Of Sound Sound waves are produced as longitudinal waves by compressions and rarefactions in matter. The medium for sound waves can be solid,
Warm Up 1. How does the function f(x) = log (x-3)+4 differ from the parent function? 2. Compute a.log (4 10) b. log (4 10 2 ) c.log (4 10 3 ) d.log.
Vibrations and Waves Amplitude – maximum displacement from equilibrium
Sound How does the ear work?. What does the ear do? index1.htm Lesson 1 page 5 It senses the frequency (pitch)
The Nature of Sound Students will describe how sound is caused by vibrations, how it is transmitted through a medium. Students will also compare the speed.
Hearing is one of the five human senses.
What is noise-induced hearing loss? It occurs when the tiny sensory hair cells in our inner ears are damaged by sounds that are too loud and that last.
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?
Hearing Sound. Have you ever felt sound? Car with really loud music playing (especially with heavy base).
Measuring Sound Intensity (Decibel) Created for CVCA Physics By Dick Heckathorn 25 April 2K + 5.
Protecting Your Hearing Raising Awareness About Excessive Noise.
Logarithms Powers of 10. log ab = log a + log b log 1/a = -log a.
What is noise? What is noise pollution? Noise measurement. Causes of noise pollution. Effects of noise pollution. Difference between noise.
1 Sound waves travel through a medium and can be visualized by Longitudinal or Compressional waves. As the sound moves through the medium, the particles.
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