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of sound
HOW TO BREAKING GLASS WITH SOUNDSOUND WAVES
Sound Waves. Welcome, this is a learning resource for wave and sound physics, mostly for the A-level curriculum. This site uses high speed video and animations to help explain waves and acoustics. It also includes links to career case studies, showing how acoustical andaudio engineers use
MAKE AN AEOLIAN HARP The eerie sound of the aeolian harp (and a lot of wind noise on the microphone!) Method: Tie one end of the fishing line to a fixed object such as a tree, a fence or a goal-post. The line must be exposed to the wind on all sides. Feed the other end of the fishing line through a hole in the base of a bucket or bin and tie it to a peg inside theDIFFRACTION
Diffraction Around An Object. Waves can spread in a rather unusual way when they reach the edge of an object – this is called diffraction. The amount of diffraction (spreading or bending of the wave) depends on the wavelength and the size of the object. Diffraction can be clearly demonstrated using water waves in ACOUSTICAL CONSULTANT: VICKY STEWART Acoustics is more than just science and maths, it’s about perception and context. We try to ensure that the right sound is in the right environment. And the work if so diverse – from music venues to the sounds of the ocean. We look at making homes quieter, but also how people exit public places in an emergency. DIFFRACTION THROUGH SLITS Diffraction through a single slit. Diffraction also occurs when a wave passes through a gap (or slit) in a barrier.This is shown in the two animations below. The difference between DIFFRACTION AND REFLECTION IN ROOMS The direct sound arriving at your ears directly from your hands is quickly followed by reflections from the walls, ceiling and floor. These reflections can cause the sound to be coloured, or to put it another way, the timbre of the sound will change. (Timbre is a French word which describes sound quality). INTERFERENCE FROM TWO POINT SOURCES Interference From Two Point Sources. The diagrams on the last page show the interference between two waves in one dimensional space – along a line. This is the sort of thing that happens when waves go back and forth on a guitar string. Waves can also combine in two dimensions, the most common example is probably water waves. SOUND SCIENCE FOR SCHOOLS AND COLLEGES This website contains learning resources for school science including acoustic demos, revision material for physics A-level, high speed video and animations about sound. Sound waves : A-level physics revision resources on acoustics and waves Lesson starters for key stage 3 and 4 Acoustic Activities: Sound demos for fairs, shows and classrooms, plus hands-on activities for science clubs VEGETABLE INSTRUMENTS Vegetables can make remarkable musical instruments. Students are challenged to make instruments and explore the science of sound. It gives students a chance to tackle a creative acoustic engineering problem of how to work with imperfect materials. It can also be the starting point for exploring how sound is made, resonance and analysisof sound
HOW TO BREAKING GLASS WITH SOUNDSOUND WAVES
Sound Waves. Welcome, this is a learning resource for wave and sound physics, mostly for the A-level curriculum. This site uses high speed video and animations to help explain waves and acoustics. It also includes links to career case studies, showing how acoustical andaudio engineers use
MAKE AN AEOLIAN HARP The eerie sound of the aeolian harp (and a lot of wind noise on the microphone!) Method: Tie one end of the fishing line to a fixed object such as a tree, a fence or a goal-post. The line must be exposed to the wind on all sides. Feed the other end of the fishing line through a hole in the base of a bucket or bin and tie it to a peg inside theDIFFRACTION
Diffraction Around An Object. Waves can spread in a rather unusual way when they reach the edge of an object – this is called diffraction. The amount of diffraction (spreading or bending of the wave) depends on the wavelength and the size of the object. Diffraction can be clearly demonstrated using water waves in ACOUSTICAL CONSULTANT: VICKY STEWART Acoustics is more than just science and maths, it’s about perception and context. We try to ensure that the right sound is in the right environment. And the work if so diverse – from music venues to the sounds of the ocean. We look at making homes quieter, but also how people exit public places in an emergency. DIFFRACTION THROUGH SLITS Diffraction through a single slit. Diffraction also occurs when a wave passes through a gap (or slit) in a barrier.This is shown in the two animations below. The difference between DIFFRACTION AND REFLECTION IN ROOMS The direct sound arriving at your ears directly from your hands is quickly followed by reflections from the walls, ceiling and floor. These reflections can cause the sound to be coloured, or to put it another way, the timbre of the sound will change. (Timbre is a French word which describes sound quality). INTERFERENCE FROM TWO POINT SOURCES Interference From Two Point Sources. The diagrams on the last page show the interference between two waves in one dimensional space – along a line. This is the sort of thing that happens when waves go back and forth on a guitar string. Waves can also combine in two dimensions, the most common example is probably water waves.WHAT IS ACOUSTICS?
What is Acoustics? Acoustics is the science of sound. Sound is central to our lives, and so it cuts across many different scientific and engineering disciplines. You probably own a mobile phone that is stuffed full of audio engineering to make it work as a phone, music player and video recorder. But acoustics goes beyond audio to includethe
CAREERS – SOUND SCIENCE FOR SCHOOLS AND COLLEGES Traits of an acoustical and audio engineer. Creative Innovative Attention to detail. Patience Team player Technical and mechanical knowledge. Natural curiosity Numerical skills Logical thinking. Problem solving Ownership Good communication skills. For a STEM acoustical engineer starting salaries typically range from £21,000 to£25,000 .
LESSON STARTERS
Extension tasks. This PDF gives a series of extension tasks that can be used with the lesson starters. They include making sounds in different ways, exploring sound through a string telephone and investigating hearing. Extension Tasks Download. Our Hearing and Sound Activities developed for use in science centres are also excellentfollow on
SOUND WAVES
Sound Waves. Welcome, this is a learning resource for wave and sound physics, mostly for the A-level curriculum. This site uses high speed video and animations to help explain waves and acoustics. It also includes links to career case studies, showing how acoustical andaudio engineers use
INTERFERENCE FROM TWO POINT SOURCES Interference From Two Point Sources. The diagrams on the last page show the interference between two waves in one dimensional space – along a line. This is the sort of thing that happens when waves go back and forth on a guitar string. Waves can also combine in two dimensions, the most common example is probably water waves.SUPERPOSITION
Superposition of Waves. Superposition is a word used to describe what happens when one wave is superimposed – ‘sat on top of’ – another.To think about how two waves might add up, let’s start by looking at the peaks and troughs which we see whenever we encounter waves in reality.Using water waves as an example, these troughs and peaks are literal – at an instant in time the heightWAVES ON A STRING
Waves on a string. All kinds of stringed instruments – guitars, pianos, violins – have stretched strings which oscillate when plucked or struck. This oscillation generates sound. The note depends on the frequency at which the string vibrates – and this depends on:STANDING WAVES
Black: The total vibration is a sum of the right and left moving waves (blue+green). The incident and reflected waves interfere with each other by superposition. The composite waveform in black is known as a standing wave. It differs from the blue and green travelling waves, although the pattern oscillates it appears to be stationary. EFFECTS OF DIFFRACTION SHADOW ZONES Effects of Diffraction shadow zones. At high frequency, when the wavelength is small compared to the object size, then the sound does not diffract very effectively. In acoustics, we use the term shadow zone to describe the area behind the object. Because if you stand there you are in an acoustic shadow (just like the optical shadows wesee) and
DIFFRACTION AND REFLECTION IN ROOMS The direct sound arriving at your ears directly from your hands is quickly followed by reflections from the walls, ceiling and floor. These reflections can cause the sound to be coloured, or to put it another way, the timbre of the sound will change. (Timbre is a French word which describes sound quality). Sound science for schools and collegesToggle Navigation
* Sound Waves
* Waves – Introduction * Longitudinal Waves* Decibel Scale
* Noise Pollution
* Hearing loss
* Oscillation
* Inertia
* Free oscillations, forced oscillations and resonance* More on damping
* Laws of Reflection* Superposition
* Interference From Two Point Sources * Noise Cancellation* Beats
* Superposition Test* Diffraction
* Effects of Diffraction shadow zones * How diffraction helps us locate sounds * Diffraction Through Slits * Diffraction Grating * Diffraction and reflection in rooms* Propagation
* Waves on a string
* Standing waves
* What is Acoustics?* Careers
* Lesson starters
* Activities
* Visit us
* Contact us
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Search for: Search … WELCOME TO SOUND SCIENCE Acoustical & Audio Engineering, University of Salford This website contains learning resources for school science including acoustic demos, revision material for physics A-level, high speed video and animations about sound. Sound waves : A-level physics revision resources on acoustics andwaves
Lesson starters for key stage 3 and 4 Acoustic Activities: Sound demos for fairs, shows and classrooms, plus hands-on activities for science clubs Salford AcousticsFollowSalford
Acoustics @SalfordAcoustic·
3 Jun
Great prizes for the winners of the first Clarity enhancement challenge, which involves building new hearing aid algorithms forspeech-in-noise!
claritychallenges@clarityprojuk Did you know that we are offering cash team prizes of $1000, $500 and $250 for 1st, 2nd and 3rd place with separate prizes for MBSTOI and Listening test ranking, courtesy of the Hearing Industry Research Consortium? For more info, go to https://claritychallenge.github.io/clarity_CEC1_doc/docs/cec1_prizes Reply on Twitter 1400436981851688962Retweet
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