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# Topic: Speed of sound

 Speed of Sound Because the speed of transmission depends on molecular collisions, the speed of sound depends on the state of the gas. The speed of sound is a constant within a given gas and the value of the constant depends on the type of gas (air, pure oxygen, carbon dioxide, etc.) and the temperature of the gas. The ratio of the aircraft's speed to the speed of sound affects the forces on the aircraft. www.grc.nasa.gov /WWW/K-12/airplane/sound.html   (782 words)

 The Physics Classroom Since the speed of a wave is defined as the distance which a point on a wave (such as a compression or a rarefaction) travels per unit of time, it is often expressed in units of meters/second (abbreviated m/s). Assuming the speed of sound in air is 345 m/s, determine the wavelength of the sound corresponding to the upper range of audible hearing. Assuming the speed of sound in air is 345 m/s, determine the wavelength of this infrasonic sound wave. www.physicsclassroom.com /Class/sound/U11L2c.html   (1953 words)

 The Speed of Sound Since the speed of a wave is defined as the distance which a point on a wave (such as a compression or a rarefaction) travels per unit of time, it is often expressed in units of meters/second (abbreviated m/s). Assuming the speed of sound in air is 345 m/s, determine the wavelength of the sound corresponding to the upper range of audible hearing. Assuming the speed of sound in air is 345 m/s, determine the wavelength of this infrasonic sound wave. www.glenbrook.k12.il.us /gbssci/phys/Class/sound/u11l2c.html   (1957 words)

 Speed of Sound It is important to note that the sound speed in air is determined by the air itself. This is consistent with the general relationship for sound speed in gases since the density of helium is so much less than that of air. The high speed of sound is responsible for the amusing "Donald Duck" voice which occurs when someone has breathed in helium from a balloon. hyperphysics.phy-astr.gsu.edu /hbase/sound/souspe.html   (235 words)

 Acoustics Chapter One: Speed of Sound The speed at which sound propagates (or travels from its source) is directly influenced by both the medium through which it travels and the factors affecting the medium, such as altitude, humidity and temperature for gases like air. It is important to note that the speed of sound in air is determined by the conditions of the air itself (e.g. This formula indicates that the speed of sound (in air) is proportional to the square root of temperature. www.indiana.edu /~emusic/etext/acoustics/chapter1_speed.shtml   (211 words)

 The Speed Of Sound The sound waves become compressed as the ambulance approaches you. This increases the frequency of the waves, which you hear as an increase in the pitch of the siren. Sound travels at the speed of sound, surprise! library.thinkquest.org /11924/swspeed.html   (488 words)

 No. 2078: Why the Speed of Sound? Mach 2, or twice the speed of sound, is over 1500 miles an hour at Earth's surface, but it's only around 1300 in the cold air at 80,000 feet. The speed of sound,c, is the square root of the partial derivative of pressure with respect to the density of the medium (say air) with the entropy, s, held constant. The speed of the disturbance is determined by the mass of the boys and the rigidity with which they are in contact. www.uh.edu /engines/epi2078.htm   (731 words)

 Speed of Sound | Science: Physics Lesson Plan Discuss the phenomenon of sound traveling much slower than light, hence seeing distant actions before hearing their accompanying sounds. Explain how knowing the distance from an action and timing the length of time a sound takes to reach us enables us to calculate the speed the sound is traveling at. Options/Variations: Discuss the variable of temperature as it affects the speed of sound; at 32F/0C the speed is 1085 feet per second. www.teachnet.com /lesson/science/physics/speedofsound.html   (199 words)

 Speed of sound in air and the temperature calculator. No air pressure table density of air calculation acoustic ... Speed of sound in air and the temperature calculator. The speed of sound c depends on the temperature of air and not on the air pressure! Sound velocity c should not be confused with sound particle velocity v, which is the velocity of the individual particles. www.sengpielaudio.com /calculator-speedsound.htm   (482 words)

 Speed of sound - Wikipedia, the free encyclopedia In conventional use and in scientific literature sound velocity, v, and sound speed, c, are used synonymously and should not be confused with sound particle velocity (also symbolized as v), which is the velocity of the individual particles. The speed of sound in water is of interest to those using acoustics as a tool in the oceans or lakes, e.g., for communication, mapping the ocean floor, or ocean acoustic tomography. On equations for the speed of sound in seawater. en.wikipedia.org /wiki/Speed_of_sound   (2372 words)

 NationMaster - Encyclopedia: Speed of sound   (Site not responding. Last check: 2007-10-07) The acoustic impedance Z (or sound impedance) is the ratio of sound pressure p to particle velocity v in a medium or acoustic component. Sound velocity c or velocity of sound should not be confused with sound particle velocity v, which is the velocity of the individual particles. The speed of sound is a constant within a given gas and the value of the constant depends on the type of gas (air, pure oxygen, carbon dioxide, etc.) and the temperature of the gas. www.nationmaster.com /encyclopedia/Speed-of-sound   (4080 words)

 [No title]   (Site not responding. Last check: 2007-10-07) Under these conditions the speed of sound is approximately 343 m/s, or 750 miles/hour. Thus in steel the speed of sound is approximately 5100 m/s. The speed of sound in water is of interest to those mapping the ocean floor. wikiwhat.com /encyclopedia/s/sp/speed_of_sound.html   (235 words)

 Speed of Sound in Air The properties that have an affect on the speed of sound in air are pressure, density, and molecular mass of the medium. The lower the density that of a medium, the faster the speed of sound and the higher the compressibility is, the slower the sound travels. speed of sound (m/s) = 331.5 + 0.60 T(°C) For example, the speed of sound in air is 386 m/s at 100 °C. The sound of speed in air is increased by 0.60 m/s for each increase of degree in air temperature. www.hypertextbook.com /facts/2000/CheukWong.shtml   (329 words)

 Dictionary : Speed_of_Sound_and_Mach_Numbers It is used to indicate flight velocities in high-speed flight and is related to the speed of sound. A speed of Mach 2 is twice the speed of sound. Because the speed of sound varies, a particular speed at sea level expressed as a Mach number would be faster than the same speed at 30,000 feet (9,144 meters), which would be faster than the same speed at 40,000 feet (12,192 meters). www.centennialofflight.gov /essay/Dictionary/sound_barrier/DI94.htm   (315 words)

 Speed of Sound (song) - Wikipedia, the free encyclopedia "Speed of Sound" was beaten to the number one spot on the UK Singles Chart by the novelty song "Axel F" by the Crazy Frog. Coldplay premiered "Speed of Sound" at a small warm-up gig in London in March 2005. During their performance of "Speed of Sound" at the 2005 Glastonbury Festival Chris asked "Crazy Frog, where are you now?". en.wikipedia.org /wiki/Speed_of_Sound_(single)   (429 words)

 Speed of Sound in a Gas - Succeed in Physical Science The speed of sound in a gas is primarily a function of its temperature. The speed of sound in a gas is a specific fraction of the average speed of the gas molecules at the given temperature. Sound travels slower at higher altitudes because the temperature and relative humidity are lower, not because the air pressure is lower higher altitudes. www.school-for-champions.com /science/sound_speed_gas.htm   (1400 words)

 speedofsound The speed of sound through a gas can be measured using a speaker that sends a tone into a tube of water with a controllable water level. Gamma is equal to the speed of sound at a constant pressure divided by the speed of sound at a constant volume. For the speed of sound through carbon dioxide, using the same frequency, the one-half wavelength measurements were: 18.9cm, 18.7cm, 19.1cm, 19.2cm, and 21.5cm. www.warren-wilson.edu /~physics/physics2/Formal_2001/ABaker/speedofsound.htm   (1409 words)

 Speed of sound   (Site not responding. Last check: 2007-10-07) Sound travels slower with increased altitude (elevation if you are on earth) primarily as a result of temperature humidity changes. In an ideal gas the speed of is really only dependent on the temperature and not of air pressure. Thus in steel the speed of sound is approximately m/s. www.freeglossary.com /Speed_of_sound   (578 words)

 Aerospaceweb.org | Ask Us - Speed of Sound Since the speed of sound through the standard atmosphere is 761 mph (1,223 km/h) at sea level, Mach 2 then follows as 1,522 mph (2,447 km/h). A passing sound wave vibrates one molecule, and that molecule induces a vibration in its neighbors, and those molecules induce further vibrations in their neighbors, and so on until the sound wave runs out of energy. In relation to our discussion, the speed of sound is directly related to the frequency at which these molecular collisions occur, and that frequency is directly related to the density of how those molecules are packed. www.aerospaceweb.org /question/atmosphere/q0059.shtml   (1020 words)

 Numerical Speed of Sound The numerical speed of sound is a variable that is used in the numerical solution of flows from low to high speeds. The numerical speed of sound is an effective speed of sound associated with Mach numbers used in the numerical splitting of a flow into upwind and downwind mass-flux components that are defined on the faces of cells of a computational grid into which a flow volume is divided. The numerical speed of sound has been found to be very useful in constructing upwind numerical-solution schemes to satisfy certain criteria. www.nasatech.com /Briefs/Aug00/LEW17011.html   (443 words)

 Aerospaceweb.org | Ask Us - Speed of Sound & Standard Atmosphere We are often asked about how fast the speed of sound is, and it is true that many sources give different answers. The heart of the problem is that speed of sound is not a fundamental property. In addition, the speed of sound is based on an approximation of the atmosphere called the standard atmosphere. www.aerospaceweb.org /question/atmosphere/q0160.shtml   (766 words)

 Speed of Sound in Gases I did a science fair project on the measurement of the speed of sound in gases when I was a 9th-grade student at Villa Walsh Academy in Morristown, New Jersey. I measured the speed of sound for air, argon, carbon dioxide and propane by observing the frequencies of the acoustic resonance modes in a closed pipe. In this equation, c is the speed, L is the length of the pipe, N is the mode number (1, 2, 3, etc.), and f is the frequency. members.bellatlantic.net /~vze2n9fe/sound/sound.htm   (1509 words)

 Speed of sound - Voyager, the free encyclopedia   (Site not responding. Last check: 2007-10-07) The speed of sound c (from Latin celeritas, "velocity") varies depending on the medium through which the sound waves pass. In a Non-Dispersive Medium – Sound speed is independent of frequency, therefore the speed of energy transport and sound propagation are the same. In a Dispersive Medium – Sound speed is a function of frequency. www.voyager.in /Speed_of_sound   (962 words)

 Encyclopedia :: encyclopedia : Speed of sound   (Site not responding. Last check: 2007-10-07) Speed of Sound, a 2005 single by Coldplay All that noise, all that sound all those places that i have found and birds go flying at the speed of sound to show you how it all began birds came flying from the underground if you could see it then you'd understand All that noise, all that sound all those places i got found and birds go flying at the speed of sound to show you how it all began birds came flying from the underground if you could see it then you'd understand www.hallencyclopedia.com /Speed_of_sound   (314 words)

 speedofsound The speed of sound depends on the type of medium that the wave is traveling through. In air, the speed of sound is about 340 m/s or 760 mph for a normal spring day. Where the elastic property is usually the bulk modulus or Young's modulus of the medium, and the inertial property is the density of the medium. ffden-2.phys.uaf.edu /212_fall2003.web.dir/Dennis_Jackson/speedofsound.html   (165 words)

 How fast is the speed of sound? - Answerbag.com   (Site not responding. Last check: 2007-10-07) The sound of speed at high altitudes, say 50,000 feet, would have a greater ground speed than sound travel at sea level. General, density affects the speed of sound, such as sea-water being nearly 800 times the density of air, where sound travels nearly five (5) times faster. The common measure of the speed of sound at sea level is approx. www.answerbag.com /q_view.php/6834   (531 words)

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