Sound

Good Essays
Topics: Sound, Wave, Acoustics
INTRODUCTION

Sound is a mechanical wave an oscillation of pressure transmitted through a solid, liquid, or gas, composed of frequencies within the range of hearing and of a level sufficiently strong to be heard, or the sensation stimulated in organs of hearing by such vibrations.

Sound is a sequence of waves of pressure which propagates through compressible media such as air or water. (Sound can propagate through solids as well, but there are additional modes of propagation). During their propagation, waves can be reflected, refracted, or attenuated by the medium.

Sources of sound

Sound can travel through any medium
The mechanical vibrations that can be interpreted as sound are able to travel through all forms of matter: gases, liquids, solids, and plasmas. The matter that supports the sound is called the medium. Sound cannot travel through a vacuum.

PROPOGATION OF SOUND
The behavior of sound propagation is generally affected by three things: * A relationship between density and pressure. This relationship, affected by temperature, determines the speed of sound within the medium. * The propagation is also affected by the motion of the medium itself. For example, sound moving through wind. Independent of the motion of sound through the medium, if the medium is moving, the sound is further transported. * The viscosity of the medium also affects the motion of sound waves. It determines the rate at which sound is attenuated. For many media, such as air or water, attenuation due to viscosity is negligible.
However, when sound is moving through a medium which does not have constant physical properties, it is refracted (either dispersed or focused).

PERCEPTION OF SOUND
For humans, hearing is normally limited to frequencies between about 20 Hz and 20,000 Hz (20 kHz), although these limits are not definite. The upper limit generally decreases with age. Other species have a different range of hearing. For example, dogs

You May Also Find These Documents Helpful

  • Good Essays

    Sound

    • 497 Words
    • 2 Pages

    S1523 Project Title The Focalization of Sound Abstract Objectives/Goals Scientists have been able to focus sound waves by transmitting an ultrasonic wave in a straight line that can give off audible sound in its path. The only disadvantage to this is the high cost. This project was designed to develop a low-cost process of focusing sound using a parabolic dish and sound-absorbent material. Methods/Materials The project began with the building of a sound box to test different materials in. The box…

    • 497 Words
    • 2 Pages
    Good Essays
  • Satisfactory Essays

    sound

    • 629 Words
    • 3 Pages

    Essay #5 Sound Discuss how at least 5 of the “function” of film sound Operate In Wall*E (time/place, character, attention, feeling, rhythm, subject, theme). Be specific in your response. The sound element narration, dialogue, sound effects and music makes the nonrealistic characters come alive. What we hear gives life to what we see and offers some clues to the meaning. Once we identify the sound on the action we suspect that it is warning for what going to happen litter on the…

    • 629 Words
    • 3 Pages
    Satisfactory Essays
  • Good Essays

    What is sound? Sound is a wave, a pattern—simple or complex, depending on the sound—of changing air pressure. Sound is produced by vibrations of objects. The vibrations push and pull on air molecules. The pushes cause a local compression of the air (increase in pressure), and the pulls cause a local rarefaction of the air (decrease in pressure). Since the air molecules are already in constant motion, the compressions and rarefactions starting at the original source are rapidly transmitted through…

    • 751 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Sound Body

    • 411 Words
    • 2 Pages

    Importance of Eating a Balanced Diet And Maintaining a Sound Body Having a sound body is essential. One of the traits or characteristics of a balanced man is having a sound body and through the process you learn how to balance both sound mind and sound body. In order to achieve this one of the things I incorporate into my daily life is exercise. Whether it be a walk/jog, playing basketball or some type of sport, or even going to the gym to work out for a bit, I try to incorporate some type…

    • 411 Words
    • 2 Pages
    Good Essays
  • Good Essays

    Sounds Study

    • 636 Words
    • 3 Pages

    What is the biggest animal ever to exist on Earth? By considerable measure, the largest known animal on Earth is the blue whale. Mature bluewhales can measure anywhere from 75 feet (23 m) to 100 feet (30.5 m) from head to tail, and can weigh as much as 150 tons (136 metric tons). That's as long as an 8- to 10-story building and as heavy as about 112 adult male giraffes! These days, most adult blue whales are only 75 to 80 feet long; whalers hunted down most of the super giants. Female blue whales…

    • 636 Words
    • 3 Pages
    Good Essays
  • Powerful Essays

    Wavelength and Sound

    • 2032 Words
    • 9 Pages

    Experiment 7: Velocity of Sound Laboratory Report Hazel Guerrero, Kyle Iddoba, Matthew Jocson, Thea Lagman Department of Biological Sciences College of Science, University of Santo Tomas Espanya, Manila Philippines Abstract Verification of the relationship between frequency of sound and its wavelength and the determination of the velocity and the speed of sound in different mediums was the main focus of this experiment. The speed of sound and its velocity was determined using the resonance…

    • 2032 Words
    • 9 Pages
    Powerful Essays
  • Satisfactory Essays

    Sound Doppler

    • 531 Words
    • 2 Pages

    Lab Sheet 1. In the lab activity, you will examine sound waves as they are emitted from a moving source. Predict what will happen to the sound waves when the sound source is in motion. Record your prediction (hypothesis) as an “if then” statement. (For example: If you select the GO button, then the train will move) If the sound source is moving, as it get closer to the person it will get louder and the farther away it gets it starts to fade. 2. Select the boy icon. Select the lowest pitch by selecting…

    • 531 Words
    • 2 Pages
    Satisfactory Essays
  • Better Essays

    Sound Engineering

    • 1041 Words
    • 5 Pages

    Jhavon Crenshaw Professor Madden English Composition 30 September 2012 Sound Engineering As a future audio engineer, it is in my best interest to learn the techniques of audio production. For editing sound you need the proper equipment, whether it is software or hardware. In order to give sound a little flavor you will need to know about mixing. Mastering is what ultimately completes the sound. Equipment, mixing, and mastering are the most important steps in audio production. The majority…

    • 1041 Words
    • 5 Pages
    Better Essays
  • Powerful Essays

    Coming Of Sound

    • 1591 Words
    • 7 Pages

    The coming of sound was an innovation to cinema that forever changed the way films were produced, viewed and performed. Sound plays many roles in the way a film is narrated and perceived by the audience. Sound, as defined in the Oxford Dictionary of Film Studies, ‘is central to the way in which a film establishes setting, shapes character, signposts its narrative, directs the audience’s and instils general emotional states’ (2012: 385). Sunrise: a song of two humans by F.W. Munrau was released in…

    • 1591 Words
    • 7 Pages
    Powerful Essays
  • Good Essays

    Sound Design

    • 2249 Words
    • 9 Pages

    not everything. There is also the sound film.” Thus explained the French filmmaker René Clair in 1929. With this statement Clair was challenging us all to push the boundaries of sound design in films. From the primitive synchronization experiments of Lee de Forest and Thomas Edison to state-of-the-art Dolby Digital 10.2 surround sound, there are no boundaries for creating a virtual deluge of sound. Even though one is tempted to hypothesize about the future of sound design, it is only through an educated…

    • 2249 Words
    • 9 Pages
    Good Essays