Properties of Sound Physical Science Ms. Pollock 2009 - 2010.

Slides:

Advertisements

Similar presentations

Hearing. How hearing works First, the ear gathers the compressional waves. Next, the ear amplifies the waves. In the ear, the amplified waves are converted.

Advertisements

Properties of Sound EQ: How does intensity, loudness, frequency and pitch affect sound waves?

All sounds are produced by the vibration of matter. If there is no vibration, there is no sound.

Chapter 11 Sound.

Sound. Sound waves are longitudinal pressure waves.

OUTLINE NOTES PAGES THE PROPERTIES OF SOUND.

Waves / Sound Physics. Waves Wave motion is the means of transferring energy through a medium without the material itself moving along with the energy.

Chapter 10: Sound Section 1: The Nature of Sound

SOUND WAVES PRODUCTION  Vibrating prongs set the air molecules in motion  Top: molecules closer together high air pressure (compression)  Bottom:

Chapter 12 Sound.

On Your Paper – True or False

Sound and Waves.

Making Sound a longitudinal wave produced when matter vibrates – this in turn, causes the medium in which it is in to vibrate ex: tuning fork (the matter)

SOUND Longitudinal Wave Travels through some medium Cannot travel through a vacuum How does vibrating drum produce sound? Skin moving up presses air.

 1) Determine the wave speed of a wave that has a period of 3 minutes and a wavelength of 0.05 m.  2) How are electromagnetic and mechanical waves different?

Parts of a Wave Crest Wavelength Trough Normal Rest Position Frequency = 2 waves per second.

Waves and Sound Chapter 15 Pages What are waves? Waves are rhythmic disturbances that carry energy through matter or space Waves generally travel.

Sound Physics Spring Sound waves n Longitudinal or compressional waves n Sound waves move through a medium n Sound waves move faster through a solid.

10.2 Essential Questions How is sound intensity measured?

Sound. Speed Factors State of matter  Fastest in a solid; slowest in a gas. Density  Faster in denser substances (iron versus copper). Elasticity 

Section 4: The Nature of Sound. Sounds All sounds are caused by something that vibrates. Your vocal cords vibrate in relation to controlled bursts of.

Waves and Sounds Ch. 18 Frequency and Pitch  A pitch is the highness or lowness of a sound.  The pitch you hear depends on the frequency of the sound.

Sound “A sound man…”. Frequency The frequency of a sound wave is perceived as the pitch (note) –High frequency → high pitch → high note –“Middle C” has.

Sound 3/27/15. Big Waves Video Big Waves: Ct1U&feature=related Ct1U&feature=related.

Ms. Barlow’s 8th Grade Physical Science Class

 Properties of Sound Waves. Loudness  Loudness describes your perception of the energy of a sound.  Loudness depends on :  The amount of energy it.

1 Sound Chapter The Nature of Sound Remember: -every sound is produced by an object that vibrates. -sound waves are compressional waves, which are.

Welcome Back Minions Now we learn about… SOUND!!! (But first a small recap…)

Chapter 12 Section 2. Amplitude Amplitude of a sound wave indicates the amount of energy in the wave Longitudinal wave’s amplitude is the tightness of.

PROPERTIES OF SOUND CHAPTER 2, SECTION 2. Loudness describes your ___PERCEPTION__ of the energy of a sound. The loudness of sound depends on 2 factors:

Properties of Sound. Loudness Loudness describes your perception of the energy of sound – It describes what you hear The closer you are to the sound,

Physics Section 12.2 Apply the sound properties of intensity and resonance Intensity is the rate at which energy flows through a unit area perpendicular.

Sound Waves. A. What Causes Sound 1. It is produced by an object that vibrates. 2. Depends on the collisions of particles to transfer energy through a.

What is sound? Sound is a longitudinal wave which travels through the air through a series of compressions and rarefactions.

 Sound is a longitudinal wave created by a vibrating object.  Sound is a mechanical wave.  PhET Simulation PhET Simulation  Demo: Standing Sound Waves.

Chapter 18 Waves and Sound

Lecture 44 – Lecture 45 Sound Ozgur Unal

10.2 Essential Questions How is sound intensity measured?

Sound and Waves.

Conceptual Physics Notes on Chapter 26 Sound.

a. A wave is a disturbance that transfers energy from place to place.

Sound and Waves.

Unit 6 Chapter 18 & 19 Sound and Light

Section 1 The Nature of Sound

Higher Intensity (Volume)

Waves & Sound A. Waves 1. The nature of waves

Chapter 10 Section 2: SOUND.

Notes 4: Introduction to Sound

Sound and Hearing it.

We are starting with our QUIZ!

Waves & Sound A. Waves 1. The nature of waves

Chapter 14 Waves and Sound.

Properties of Sound Chapter 16 Section 2.

Sound and HOW WE Hear it.

Sound and Waves.

Chapter 15-1 Sound.

Waves & Sound A. Waves 1. The nature of waves

All sounds are produced by the vibration of matter

Sound and Waves.

PROPERTIES OF SOUND CHAPTER 2, SECTION 2

Chapter 12, Section 2 Properties of Sound

Properties of Sound EQ: How does intensity, loudness, frequency and pitch affect sound waves?

Sound and Waves.

Properties of Sound EQ: How does intensity, loudness, frequency and pitch affect sound waves?

Sound and Hearing it.

Presentation transcript:

Properties of Sound Physical Science Ms. Pollock

Intensity and Loudness Quieter sound waves carry less energy than louder sound waves. Energy – amplitude; depends on number of molecules in compressions and rarefactions 16-soundwave.jpg

Intensity os/sound_intensity_levels.gif Amount of energy that flows through a certain area in a specific amount of time Reduction in volume = reduction in intensity Influences distance sound can be heard Decreases with distance

Loudness Human perception of sound intensity High intensity = more energy, greater loudness ook10/NTX1-14.GIF

The Decibel Scale Loudness is a HUMAN perception. It will vary from person to person. Intensity of sound measured in decibels (dB) Faintest sounds (whisper) 0 dB Loudest sounds (jet) 150 dB Above 120 dB may result in hearing loss and pain

The Decibel Scale content/uploads/2009/03/decibel-scale.gif

Pitch Pitch – how high or low a sound seems to be High frequency = high pitch Greater vibration of parts of ear Healthy human ear able to hear 20 Hz to 20,000 Hz but is most sensitive to 440 Hz to 7,000 Hz Ultrasonic and infrasonic waves not heard, but used. Medical treatments

The Doppler Effect 2.phys.uaf.edu/212_fall2003. web.dir/nathan_earls/doppler _effect.gif Change in pitch or wave frequency due to a moving wave source Lengths of compressions and rarefactions altered, so pitch changed Occurs in sound waves and electromagnetic waves (radar)