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Sound Sensation Lab SPARK Saturdays Hui Jun Tay & Ameya Kamat
Sound Sounds are vibrations that propagate in air Think ripples in a pond, waves on a beach
Amplitude Measured in Decibels (dB) Loud noises have “bigger” vibrations ◦ Hitting a ruler hard vs hitting it softly
Microphone Loud sounds -> higher amplitude variation Louder sound hits the microphone -> higher voltage -> stronger signal Changes in pressure (due to vibration) correspond to changes in voltage
Speakers Basically work in reverse ◦ Based on voltage, generate vibrations
Sound of a Sine Wave “Pure” tone
Frequency Measured in Hertz (Hz) How fast it vibrates (cycles per second) ◦ Faster -> Higher Pitched ◦ Slower -> Lower Pitched
Fun Facts Humans: 20 – 20,000 Hz ◦ Younger people can hear higher frequencies! Dogs 20 – 45,000 Hz ‘Mosquito Frequency’ ringtone
Demo/Exporation Try different frequencies. Don’t hurt yourself!
Checkpoint #1 What we’ve learnt so far… ◦ Sound as a Sine Wave ◦ Amplitude ◦ Frequency
Actual Sound Do Voices and Music sound like that? ◦ No! Not one ‘pure’ sine wave, but multiple overlapping sine waves
Frequency Domain The different frequencies of a given sound
Different Instruments Audacity! ◦ Piano ◦ Trumpet ◦ Violin ◦ Bass
Checkpoint #2 What we’ve learnt so far… ◦ Sound as a Sine Wave ◦ Amplitude ◦ Frequency ◦ Multiple Sine Waves ◦ Frequency Domain
Filtering “Cut off” frequencies we do not want
Before and After FILTER!
Audacity Demo Filtering out an instrument Canon in D ◦ Violin, Cello, Guitar, Bass
Audacity Demo – Low Pass
Canon in D Four Instruments (Violin, Cello, Guitar, Bass) Try to get ◦ 1) only the bass ◦ 2) only the violin
Checkpoint #3 What we’ve learnt so far… ◦ Sound as a Sine Wave ◦ Amplitude ◦ Frequency ◦ Multiple Sine Waves ◦ Frequency Domain ◦ Filtering
Messing Around Record your voice on Audacity Apply filters, effects, anything you like Have fun!
1 All About Sound Rob Shaffer Stoklosa Middle School, Lowell June 11, 2013 Note: this lesson utilizes the Audacity computer program to create and analyze.
Sound J.Sample Sound Sound is a form of energy produced and transmitted by vibrating matter. Sound must have a medium, (matter), to travel through.
The Physics Of Sound Why do we hear what we hear?
Properties of Sound. Four Properties of Sound Frequency (pitch) Amplitude (volume) Timbre (quality/color) Duration (length)
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,
Why does a violin sound different from a horn? Several kinds of audible information Pitch Timbre Attack Decay Vibrato.
Introduction to SOUND. Topics To Study Introduction to Sound Characteristic of Sound Waves Recording Audio Files Analogue to Digital Audio.
Lecture # 22 Audition, Audacity & Sound Editing Sound Representation.
Chp 13 Sound and Music. What is sound? A sound wave is a wave of alternating high pressure and low pressure regions. Anything that vibrates in air creates.
Sound. What makes sound? vibrations How do brass instruments like a trumpet or tuba produce sound? Vibrating air.
The of SOUND What is it? There are two ingredients for sound. First, we need a VIBRATION, then a MEDIUM.
Chapter 21 Musical Sounds. 1. NOISE VERSUS MUSIC Wham - Noise and Wave Forms Pitch Pitch Loudness Loudness Quality Quality Three characteristics of a.
© NTScience.co.uk 2005KS3 Unit 8l – Sound and Hearing1 Sound.
Chapter 15 Sound 15.1 Properties of Sound 15.2 Sound Waves 15.3 Sound, Perception, and Music.
Recording Arts…Audio Fall Range of Human Hearing 20 Hz – 20,000 Hz or 20 Hz – 20 kHz.
Parts of a Wave Crest Wavelength Trough Normal Rest Position Frequency = 2 waves per second.
Music by Handel Water Music Suite - Allegro. Pressure Time 1 s What we already learnt … Amplitude E.g.: Frequency = 2 Hz Graphical representation of the.
Chapter 26 Sound. Sound is a form of energy that spreads out through space.
15.1 Properties of Sound If you could see atoms, the difference between high and low pressure is not as great. The image below is exaggerated to show.
Physics of Sound Part 1 Sound waves How they are generated and travel.
Musical Instruments. Notes Different musical notes correspond to different frequencies The equally tempered scaled is set up off of 440 A meaning.
Sound Waves Can you hear me now?. Wave Review Sound is a Longitudinal Wave- it moves back and forth like a spring. Sound is a Mechanical Wave- it needs.
Recording Arts…Audio Sound Waves Fall What does this all mean to you in this class? You are always working with sound waves – it is important to.
Section Vocabulary Pitch- the highness or lowness of sound Hertz- unit used to measure the frequency of a sound wave Octave- A series of 8 notes.
Day 6 Exam I is on Thursday. Be sure to attend lab this week.
Standing waves on a string (review) n=1,2,3... Different boundary conditions: Both ends fixed (see above) Both ends free (similar to both ends fixed )
Sound waves Pg. 45 in NB Sound waves Pg. 45 in NB.
Sound is a form of energy that is created by vibrations passing through matter. Click Above for Video Clip.
Physics of Sound WAVES. Sound is a wave. It is a wave of energy that moves through matter; solids, liquids, gases.
C-15 Sound Physics Properties of Sound If you could see atoms, the difference between high and low pressure is not as great. The image below is.
Sound Energy What is sound? Sound is – A form of energy made by vibrations. – When an object vibrates it causes the air particles around it to move.
© 2010 Pearson Education, Inc. Conceptual Physics 11 th Edition Chapter 21: MUSICAL SOUNDS Noise and Music Musical Sounds Pitch Sound Intensity and Loudness.
Sound and Wave Interference Sound Waves Sound is a compressional wave which travels through the air through a series of compressions and rarefactions.
The unit of measurement for loudness levels is the phon, and is arrived at by reference to equal-loudness contours. By definition two sine waves, of differing.
Sound & Waves Mrs. Wolfe. Recall the two types of waves… Transverse –Particles move up and down Longitudinal/Compression –Particles move side to side.
Beath High School - Int 1 Physics1 Intermediate 1 Physics Sound and Music Glossary amplifier to frequency hertz to noise pollution octave to speed trace.
Sound Overview The Facts of Sound The Ear and Sound Sound Vocabulary Musical Instruments and Sound.
Waves. Class Starter- Waves 1)What are some examples of waves in nature? – ripples in a pond, a guitar string, an earthquake 2) How can we measure a wave?
Sound waves!. The Nature of Waves A wave is a repeating disturbance or movement that transfers energy through matter or space.
Sound waves. Objectives Investigate and analyze characteristics of sound waves: frequency, wavelength, and amplitude. Examine and describe sound wave.
L 22 – Vibrations and Waves  resonance clocks – pendulum springs harmonic motion mechanical waves sound waves golden rule for waves Wave.
L 23 – Vibrations and Waves  resonance clocks – pendulum springs harmonic motion mechanical waves sound waves golden rule for.
Intro to Fourier Series BY JORDAN KEARNS (W&L ‘14) & JON ERICKSON (STILL HERE )
Waves A wave is a means of transferring energy. A Transverse Wave The wave is vibrating perpendicular to the direction that the energy is moving. E.g.
COSC 1P02 Introduction to Computer Science 4.1 Cosc 1P02 Week 4 Lecture slides “Programs are meant to be read by humans and only incidentally for computers.
Sound Chapter 16. April 18, 2011 Create a vocabulary square for – Sound Chapter 16, Sec. 1.
SOUND S4P2: Students will demonstrate how sound is produced by vibrating objects and how sound can be varied by changing the rate of vibration.
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