Beats September 9, 2005.

Slides:

Advertisements

Similar presentations

A 1. 2 meter string is stretched between two points

Advertisements

A 80cm string is stretched between two points. The velocity of a wave o the string is 200m/s. Draw and find the frequency and wavelength of the first and.

MUSIC NOTES Noise Versus Music  What is the difference between noise and music?  Answer: The appearance of the waveform.  What is the difference between.

Beats = Some Graphs Recall what a single frequency tone sounds like Play on Sound Generator A=440 Hz. The Graph:

Chapter 12 Objectives Differentiate between the harmonic series of open and closed pipes. Calculate the harmonics of a vibrating string and of open and.

Sound and Music A Deliciously Delightful Discussion of Resonance, Harmonics, Beats, and Periods and Frequencies Presented by Giuliano Godorecci, Lisa Schalk,

The Principle of Linear Superposition and Interference Phenomena CHAPTER 17 Interference Constructive and Destructive Interference: BEATS Standing Waves:

Explain what beats are and why they occur… 1)When two sounds are slightly different in frequency, a “warbling” beat is heard 2)This is because the two.

Sound. Sound Waves travel as compressions & expansions Alternating regions of compressed and expanded air These regions move away from source as longitudinal.

Ch 17. Principle of Linear Superposition and Interference Phenomena When the pulses merge, the Slinky assumes a shape that is the sum of the shapes of.

What is the wavelength? What is the amplitude?.

More Waves in Music and Sound Decibels, Interference and Doppler Effect.

Harmonics. Each instrument has a mixture of harmonics at varying intensities Principle of superposition Periodics- Repeating patterns of waveforms.

1) depends on the speed of sound in the pipe 2) you hear the same frequency 3) you hear a higher frequency 4) you hear a lower frequency You blow into.

Beats AP Physics 1.

PHYSICS CLASS ACTIVITY. CLASS ACTIVITY: TUNING FORK FREQUENCY.

Beat Frequency beat frequency is a fluctuating volume of sound it occurs when two sound waves of slightly different frequency are heard together constructive.

3.3 Waves and Stuff Science of Music 2007 Last Time  Dr. Koons talked about consonance and beats.  Let’s take a quick look & listen at what this means.

12.7 Graphing Trigonometric Functions Day 1: Sine and Cosine.

12.7 Graphing Trigonometric Functions Day 1: Sine and Cosine.

IOne goes up the other goes up.. Frequency (ƒ) – number of wave cycles that pass in a point of given time 1/period How often something happens. Your heart.

Foundations of Physics

Integrated Science Unit 4, Chapter 11.

Sound and music Contents: Sound 101 Beats Overtones and music.

Experiments & Demos with Sound The free software! Winscope osc251.zip 89Kb Gspec spectrum.exe 186Kb Sweepgen sweepgen.exe 83.5Kb Audacity Mb.

Wave Interference: Beats

ConcepTest 12.1a Sound Bite I

Harmonic Motion and Mechanical Waves

-The Ear -Beats Physics Mrs. Coyle.

Wave interference and Beat Frequency

Foundations of Physics

Basic Wave Properties Notes

Characteristics of Waves

The Principle of Linear Superposition and Interference Phenomena

Phase Two quantities are in phase if they are simultaneously increasing or decreasing, eg V & I are in phase in an AC circuit Waves in phase.

How is Music Related to Math?

Sound and Hearing it.

Waves © D Hoult 2007.

Chapter 17 Goals: Understand the principle of superposition.

An object moves with simple harmonic motion

Some Remarks About Beats

Sinusoidal Functions.

Sound Waves and Beats with Vernier Sensors

CHAPTER 5 WAVES, WAVELENGTHS, FREQUENCIES.

Lecture 12 Chapter 17 Waves II

Sound and HOW WE Hear it.

Chapter 16: Sound HW2: Chapter 16: Pb.2, Pb 18, Pb.24, Pb 35, Pb.40, Pb.62 Due on Wednesday 24.

Phase Two quantities are in phase if they are simultaneously increasing or decreasing, eg V & I are in phase in an AC circuit Waves in phase.

LECTURE 9 Ch 16.7 BEATS Ch Doppler Effect

Other terms related to a periodic wave

What is a wave? A wave is simply a movement of energy that travels through a medium…

4th week I realise I shall make mistakes if archive all your work

Foundations of Physics

The Principle of Linear Superposition and Interference Phenomena

1 The Doppler shift explains

-The Ear -Beats Physics Mr. Berman.

Graphs of Sine and Cosine Sinusoids

Superposition Superposition is the ability of waves to superimpose (add displacements & energy) as they move through each other. Constructive interference.

Superposition Superposition is the ability of waves to superimpose (add displacements & energy) as they move through each other. Constructive interference.

Section 2: Characteristics of Waves

+ Audacity tutorials on how to show them off

Sound and Hearing it.

Chapter 13 – Waves II.

Presentation transcript:

Beats September 9, 2005

Recall what a single frequency tone sounds like Play on Sound Generator A=440 Hz. The Graph:

440 Hz. and 450 Hz. Compared 440 Hz. 450 Hz.

440 Hz. and 450 Hz. Together

440 Hz. and 450 Hz. Together for a longer time (0.1 second)

440 Hz. and 450 Hz. Together for an even longer time (0.5 second) Tbeat These are BEATS From this graph we see that Tbeat = 0.1 seconds. fbeat = 10 Hz..

Why?? In phase out of phase in phase again

The Concept Two sounds start together (in phase). After Tbeat seconds they get back together again. One of the waves must have gone through N cycles while the other went through (N+1) complete cycles. They are therefore together again!

The *(*@)$# math ! The beat frequency between two simultaneous tones is equal to The difference between the frequencies of the two tones!

LISTEN & Look……. Isn’t science wonderful??