24.1 –Properties of Sound pp

Slides:

Advertisements

Similar presentations

Chapter 12 Sound. What is sound? Sound is a compressional wave which travels through the air through a series of compressions and rarefactions.

Advertisements

Compare the speed of sound in different mediaCompare the speed of sound in different media Explain how frequency and pitch are relatedExplain how frequency.

Electricity, Sound and Light Chapter Nine: Waves and Sound 9.1 Harmonic Motion 9.2 Waves 9.3 Sound.

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.

Introduction to Sound Unit 13, Presentation 1. Producing a Sound Wave  Sound waves are longitudinal waves traveling through a medium  A tuning fork.

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

By Aimee Chavez. Wave: a disturbance that transfers energy from place to place. The material through which a wave travels through is called a medium.

WAVES PROPERTIES Chapter 11, Section 3. What is a wave? A wave is a disturbance that carries energy through matter or space.

Chapter 10: Sound Section 1: The Nature of Sound

SOUND Sound is energy transferred by the compression & rarefaction of matter: sound waves are compressional waves Collisions between molecules transfer.

Chapter 21 – The Nature of Sound

The Nature of Sound Physical Science. 10/23/20152 What is Sound? Sound comes from vibrations that move in a series of compressions and rarefactions (longitudinal.

Sound. Speed of sound in solids, liquids, and gases Speed of sound in gas (air): 344 m/sec. Speed of sound in liquid (water): 1100 m/sec Speed of sound.

Characteristic Review and Propagation

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)

Chapter 24 –Sound 24.1 –Properties of Sound pp

Sound. Sound Waves Sound is a disturbance that travels through a medium as a longitudinal wave.

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

SOUND Can You Hear Me Now?. GOAL 5: Students will describe the characteristics of and investigate Wave Motion, Sound, and Light.  Objective 1: Differentiate.

24.3 Sound  Sound is a traveling oscillation of atoms or pressure.  When they are pushed by the vibrations, it creates a layer of higher pressure which.

24.1 The frequency of sound  The pitch of a sound is how you hear and interpret its frequency.  A low-frequency sound has a low pitch.  A high-frequency.

Chapter 21 - The Nature of Sound. Sound is produced by ________________ which are the complete _____________________ motion of an object Sound travels.

Chapter 21 The Nature of Sound.

Chapter Twenty-Four: Sound  24.1 Properties of Sound  24.2 Sound Waves  24.3 Sound Perception and Music.

UNIT EIGHT: Waves  Chapter 24 Waves and Sound  Chapter 25 Light and Optics.

I. What is Sound? Longitudinal waves or compression waves. Created by vibrations Vibrations are composed of Compression Rarefaction Medium (or media)

SOUND. The speed of sound depends on the medium it travels through. – Warmer medium  faster speed – Cooler medium  slower speed Particles in cool materials.

Properties Of Sound Sound waves are produced as longitudinal waves by compressions and rarefactions in matter. The medium for sound waves can be solid,

The Nature of Sound and its Applications. Sound is produced by vibrations Sound is a compression(longitudinal) wave.

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

Sound Sound Waves  Longitudinal Waves (disturbance) that travel through a medium  Begins with a vibration  Carries ENERGY (like all waves)  Can travel.

Chapter Twenty-Four: Sound

Properties of Sound Compare the speed of sound in different media

Conceptual Physics Notes on Chapter 26 Sound.

Properties of Sound Compare the speed of sound in different media

Chapter 17: Mechanical Waves & Sound

Higher Intensity (Volume)

Properties of Sound Unit 13 Section 2.

Unit 7: Vibrations, Waves & Sound Chapter 20: Sound

youtube vibrating string

Chapter 14 Sound.

Ch Waves & Sound II. The Nature of Sound Speed of Sound

We are starting with our QUIZ!

Ch Waves & Sound II. The Nature of Sound Speed of Sound

WAVE INTERACTIONS.

Notes 21.1 – Properties of Sound

Chapter 21 – The Nature of Sound

Chapter 21 – The Nature of Sound

Ch Waves & Sound II. The Nature of Sound Speed of Sound

Ch Waves & Sound II. The Nature of Sound Speed of Sound

Vibrations through a medium

24.1 The frequency of sound The pitch of a sound is how you hear and interpret its frequency. A low-frequency sound has a low pitch. A high-frequency.

Cornell Notes Sound Waves

Chapter 21: Sound.

Chapter 21 The Nature of Sound

All sounds are produced by the vibration of matter

Sound Chapter 11.

Sound Chapter 26.1 – 26.4.

Sound: The Science of Music

Ch Waves & Sound II. The Nature of Sound Speed of Sound

Chapter 12, Section 2 Properties of Sound

Ch Waves & Sound II. The Nature of Sound Speed of Sound

Sound Waves, Pitch, and Loudness

Waves & Sound The Nature of Sound Speed of Sound Human hearing

Presentation transcript:

24.1 –Properties of Sound pp. 578 - 582 Chapter 24 –Sound 24.1 –Properties of Sound pp. 578 - 582

SPEED OF SOUND Depends on the medium through which it is traveling. Changes when the medium changes. Sound travels faster in steel than in water. Speed of sound depends on temperature. The cooler the temperature, the slower the speed of sound.

24.1 The speed of sound The speed of sound in normal air is 343 meters per second (660 miles per hour). Sound travels through most liquids and solids faster than through air. Sound travels about five times faster in water, and about 18 times faster in steel.

24.1 The speed of sound Objects that move faster than sound are called supersonic. If you were on the ground watching a supersonic plane fly toward you, there would be silence. The sound would be behind the plane, racing to catch up.

24.1 The speed of sound Passenger jets are subsonic because they travel at speeds from 400 to 500 mi/hr.

PITCH The pitch of a sound is determined by the frequency of the sound wave. High pitch = high frequency Low pitch = low frequency

24.1 The frequency of sound Almost all the sounds you hear contain many frequencies at the same time. Humans can generally hear frequencies between 20 Hz and 20,000 Hz.

FREQUENCIES YOU CANNOT HEAR Sounds with frequencies lower than 20 Hz are called infrasonic. “Infra” means “below”. Sounds with frequencies higher than 20,000 Hz are called ultrasonic. “Ultra” means “beyond” Ultrasonic waves are used to clean jewelry and to remove ice from metal.

24.1 The frequency of sound Sounds near 2,000 Hz seem louder than sounds of other frequencies, even at the same decibel level. According to this curve, a 25 dB sound at 1,000 Hz sounds just as loud as an 40 dB sound at 100 Hz.

THE DOPPLER EFFECT For sound waves, the Doppler effect is the apparent change in frequency of a sound caused by the motion of either the listener or the source of the sound.

LOUDNESS Loudness is related to amplitude. The higher the amplitude of the wave, the louder the sound is. The lower the amplitude of the wave, the softer the sound is. Loudness is measured in decibels (dB).

SEEING SOUNDS An oscilloscope is used to graph representations of sound waves.

HOW IT WORKS A microphone converts the sound waves into an electric current. The oscilloscope converts the electric current into graphs. The highest point (crests) represent compressions of the sound wave; the lowest point (trough) represents rarefactions.