Sound Waves.

Slides:

Advertisements

Similar presentations

SOUND WAVES, REFLECTION & REFRACTION

Advertisements

Unit 7 Waves Chapter 11 Pages

Prepared By: Shakil Raiman.  Sound waves are longitudinal waves  Sound waves are produced by vibration of objects.  Here the loudspeaker vibrate and.

Chapter 13 Sound Properties of Sound – the source of all sound waves is vibration  Sound waves – longitudinal waves – the particles in the medium are.

CP Physics Ms. Morrison.  Mechanical – needs medium  Longitudinal  Created by vibrations which disturb the medium and transmit the wave energy  Sound.

Sound Chapter 26.

How Sound Travels Sound is a mechanical wave It moves by vibrating particles in: –Solids –Liquids –Gases Sound can not travel in a vacuum (empty space)!!!

Dr. Jie ZouPHY Chapter 20 Sound The physicist usually takes the objective position and defines sound as a form of energy that exists whether or not.

Waves/Sound. The Nature of Waves What is a wave? A wave is a repeating disturbance or movement that transfers energy through matter or space.

Bell Work: Test Review 1. What is the range of human hearing?

Midpoint (Equilibrium) Crest (high point) Trough (low point)

Vibrations, Waves, & Sound

SOUND UNIT NOTES. The Nature of Sound Sound is a disturbance that travels through a medium as a longitudinal wave.

Goal: To understand sound Objectives: 1)To learn about Sound waves 2)To understand the Speed of sound 3)To explore Reflections (echo, echo, echo) 4)To.

Reflection A wave is reflected when it comes into contact with a barrier A wave is reflected when it comes into contact with a barrier Law of Reflection.

Ch 20 SOUND Sound is a compression wave in an elastic medium. These can include solids, liquids and gases or a plasma.

Chapter 20 Sound. Slide - A tree in the forest. 1. ORIGIN OF SOUND  The frequency of a sound wave is the same as the frequency of the source of the.

Chapter 20 Sound 1. ORIGIN OF SOUND The frequency of a sound wave is the same as the frequency of the source of the sound wave. Demo - Oscillator and.

Warm up At 0°C sound travels through air at a speed of 330 m/s. If a sound wave is produced with a wavelength of 0.10 m, what is the wave’s frequency?

Anything that vibrates generates a sound! (unless it’s in a vacuum)

Vibrations and Waves Wave: A Disturbance That Travels Or…

Waves A repeating movement or disturbance that transfers energy...

Chapter 26 Sound & Music Sound …...a longitudinal wave in air caused by a vibrating object.

Longitudinal Wave 20.5 Longitudinal Wave.

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

Sound and Wave Interactions. Sound “If a tree falls in a forest …?” What is sound? –Longitudinal wave, particles transfer energy –Mechanical wave, must.

Chapter 22 Objectives Describe reflection, refraction, diffraction, and interference. Compare destructive interference with constructive interference.

Chapter 19 Sound Web Page Sound... n...a longitudinal wave in air caused by a vibrating object. n Demo: Vortex Box.

Waves Waves as energy Waves as energy Types of waves Types of waves Parts of a wave Parts of a wave Movement of waves Movement of waves Properties of.

Chapter 10 Section 1 The Nature of Waves

Resonance matching of forced vibration and natural frequency of an object, resulting in large amplitude of waves (standing wave + constructive interference.

Chapter 20 Sound. 1. ORIGIN OF SOUND  The frequency of a sound wave is the same as the frequency of the source of the sound wave. Demo - Oscillator and.

Wave Properties Six Interactions of Waves. Wave Properties There are 6 main properties, or interactions, of waves that occur when a wave comes in contact.

Sound and Light Chapter 12. Sound A longitudinal wave that spreads in all directions Speed depends on medium –Solids and liquids = quick movement –Gasses.

SOUND SECONDARY 3 PHYSICS. NATURE AND PRODUCTION OF SOUND Sound is….. A form of energy an example of longitudinal wave Produced by vibrating sources placed.

Chapter 20 – The Energy of Waves

Introduction to Sound Waves

Warm Up ) What type of wave is sound? (Transverse or Longitudinal) What is the medium that sound travels through? 2) If I had a black plate and.

Conceptual Physics Hewitt, 1999 Bloom High School.

IPC Notes Wave Properties. Definitions reflection – the bouncing back of a wave ex) your reflection in a mirror & a sound echoes.

The Nature of Sound Sound waves are produced by the vibrations of matter. In most cases, the original vibration (string, reed mouthpiece, vocal chords)

Sound. The origin of sound All sound are produced by the vibrations of material objects. Our voice results from the vibration of our vocal chords. Sound.

The Nature of Sound. Sound is Longitudinal  Longitudinal wave or compression wave  Compression vs. rarefaction  Longitudinal wave or compression wave.

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

Intro to waves. The source of all waves is something that vibrates Wave Description.

 Sound. What is sound?  Any object vibrating in air creates sound waves by moving air molecules back and forth.  Sound waves are longitudinal and are.

Sound. Characteristics Loudness --> Amplitude Pitch -->frequency.

SOUND AND LIGHT Chapter 1 THE ENERGY OF WAVES. Section 3 Wave Interactions.

Essential Question (pg. 81): What happens if the medium vibrates the same way as the wave motion?  It creates a longitudinal wave.

Thermal Energy Light Energy Sound Energy Potpourri I Potpourri II.

Chapter 15 – Characteristic of Waves Learn the language of waves Learn the language of waves Wave – a disturbance that transfers energy from place to place.

Six Interactions of Waves

Longitudinal Waves (longitudinal wave (longitudinal vs. transverse)

Sound and Light Chapter 12.

Properties of Waves Waves have energy and transfer energy when they interact with matter They cannot travel through empty space!

WARM UP 11/5/15 In your IAN notebook, solve the following problem. Show ALL of your work including the formula you used and the units of the answer.

Behavior of Waves 17.3.

Wave Interactions.

The Physics of Sound.

Wave Properties & Interactions

Section 3: Interactions of Waves

PROPERTIES OF SOUND PROPERTIES OF SOUND.

Unit 7 Waves Chapter 11 Pages

Sound and Music Chapters 20 and 21.

Sound Waves Unit 6.

Wave Interactions.

Behavior of Waves Chapter 10.3.

Presentation transcript:

Sound Waves

What causes sound? Sound is a longitudinal wave caused by vibrations of a medium. Humans perceive different frequencies of sound waves as different pitches. Humans can hear between 20hertz and 20,000hertz.

Conduction of Sound The closer molecules are together, the better sound will be conducted. Gasses conduct sound poorly, liquids are better and solids are best.

The Speed of Sound The speed of sound depends on Temperature Humidity Wind conditions At normal room conditions, sound travels at 340meters per second

Reflection of sound An echo is a reflected sound wave. When a sound wave hits a wall, the angle it bounces off the wall is the same angle that it hits the wall.

Refraction of Sound Refraction is the bending of a sound wave. When a sound passes through different temperatures in the same medium, the sound bends. Sound bends towards the cold air.

Uses of Refraction of Sound Submarines can hide in thermal gradients Ultrasounds are used to diagnose medical conditions Animals use ultrasound refraction to track prey.

Forced Vibration A vibrating object held can cause another object to begin vibrating at the same frequency Soundboards on stringed instruments Tuning fork amplication

Natural Frequency The set of frequencies that an object vibrates at when struck. Most objects have a natural frequency.

Resonance When a forced vibration matches the natural frequency of an object, the amplitude of the motion increases. Swings Radios Bridges

Tacoma Narrows Bridge Collapse Breaking Glass by Voice