Amplitude is the chareteristic of a sound related to what? Pitch, Frequency, Loudness, Wavelength?
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Pitch and frequency are directly related (directly proportional) and inversely proportional to wavelength.\n\nAmplitude is another property though and is related to loadness.
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The frequency of the sound wave determines the pitch.  When you speed up a recording, you are increasing the frequencey, so pitch rises.  The reverse happens when you slow down a recording.
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It sounds like the OCTAVE or the set of seven and the ONE becomes the Eight or the OCTAVE.\n\nExamples:  Sound or Music.  Seven notes to the diatonic scale and the eigth becomes the octave or the same note but doubled in frequency.  A=440 Vibrations per second.  The first octave above A= 880 Vibrations per second.  The chord or Triad in music is made up of the notes number 1-3-5 of the scale.  again we see the 3-5 and the ONE is same as the the eight.\n\nLight.  Seven colors to the rainbow and the eight become the same color as the first but doubled in frequency.\n\nThe basic geometry of the Taj Mahal is an "octagon", hence it very pleasing architecture.\n\nthere are many such examples of ONE-Eight codes in nature and in mathematics in "Group" theory and in "numbers theory" ...The number 8 and 24 (3x8) have particular "magical" properties and see to "pop out" of all kinds of situations in symetry.\n"String theory" (superstrings or M theory) in physics  use the "functions" of Srinivasa Ramanujan" that are basically eight in structure...Ramanujan received his "equations" from his deva, the Goddess Hammakal??...He recieved up to 12 of these per day although he was "self taught" in mathematics.  He lived in the 1850's.\n\nCyril Borg, the Cyborg
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Using spectrogram analysis, the units of measure are typically hertz (on the frequency axis) and decibels (dB, on the amplitude axis). Either may be expressed linearly or logarithmically.
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The decibel (dB) is a measure of the ratio between two quantities, and is used in a wide variety of measurements in acoustics, physics and electronics. While originally only used for power and intensity ratios, it has come to be used more generally in engineering. The decibel is widely used in measurements of the loudness of sound. It is a "dimensionless unit" like percent. Decibels are useful because they allow even very large or small ratios to be represented with a conveniently small number (similar to scientific notation). This is achieved by using a logarithm.
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you would hear the resultant of the two frequencies both in frequencie and amplitude.
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How do you define sound? The tree falling in the forest creates a pressure wave that would be heard by a listener as a sound. Does your defintion require a listener? The pressure wave exists whether or not there is one.  Merriam-Webster defines sound as:\n\n1 a : a particular auditory impression : TONE b : the sensation perceived by the sense of hearing c : mechanical radiant energy that is transmitted by longitudinal pressure waves in a material medium (as air) and is the objective cause of hearing
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We want the speed of sound here.\nL=V/F, where L=wavelength, F=frequency in Hz (20000) and V=velocity of sound ~1000 ft/sec)\nL = 0.05 ft = 0.6 inch implying a 0.3 inch eardrum.\nReasonable?  I've never seen an eardrum but would think it's about that size.
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Frequency. That is what it is all about, not decibals(loudness).Light and sound and radio....they are all waves, and sound carries a signature wave frequency. Some high frequencies cannot be heard by the human ear, even though our bodies and even voices produce high-frequency sounds we cannot hear all of the time. Did you ask the flatulence question as well? That applies in some rare occurences as well. Children can hear some frequencies that adults cannot. There is even a device sold that emits this frequency to annoy and chase off children and loitering teens. (It has been in the headlines recently because some adult humans can still hear this frequency well into their 30's.)\nUnless you asked this Q wrong, there is no sound too loud to be heard unless the eardrum is blown instantly.Very loud sounds are usually felt too in vibration, so even if you're eardrum blew you would still feel it and thusly "hear" the sound as a fully deaf person would.
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The correct word is "timbre".  That is to say, quality.  Consider middle C played on a piano and a violin, with the same loudness.  Same loudness = same amplitude; same pitch = same frequency.  Yet they sound different, i.e. the timbre or  quality is different. \n\nADDITIONAL INFORMATION: In string and wind instruments, progressive waves (transverse in strings and longitudinal in wind) travel outwards in opposite directions from the point where the vibration was started.  When they reach the end of the string or pipe, they are reflected back inwards.  Interference occurs between the outwards and inwards waves and a standing wave is produced.  In this, certain points called nodes (N) are always at rest, while others mid-way between each pair of nodes are in continuous vibration with maximum amplitude; they are called antinodes (A).  The distance between two consecutive Ns will represent the half wavelengths in your question.\n\nVarious standing wave patterns can be produced.  If there is a node at each end of the string or pipe and just one antinode between them, the standing wave has one loop and the fundamental note is emitted.  If there is more than one loop, overtones are produced.  It is these overtones (when added to the fundamental) that give a sound its timbre or quality.
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Sound intensity is variously defined as amplitude or displacement (Ref. 1) or power per unit area (ref. 2).\nIf you mean a displacement ratio of 10000, then decibels difference = 20 * log10(10000) = 80 dB for a new total of 160 dB.\nIf you mean a power ratio of 10000, then decibels difference = 10 * log10(10000) = 40 dB for a new total of 120 dB.
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Sound: \nMain Entry: sound\nFunction: noun\nEtymology: Middle English soun, from Old French son, from Latin sonus, from sonare to sound; akin to Old English swinn melody, Sanskrit svanati it sounds\n1 a : a particular auditory impression : TONE b : the sensation perceived by the sense of hearing c : mechanical radiant energy that is transmitted by longitudinal pressure waves in a material medium (as air) and is the objective cause of hearing\n2 a : a speech sound <a peculiar r-sound> b : value in terms of speech sounds <-cher of teacher and -ture of creature have the same sound>\n3 archaic : RUMOR, FAME\n4 a : meaningless noise b obsolete : MEANING c : the impression conveyed : IMPORT\n5 : hearing distance : EARSHOT\n6 : recorded auditory material\n7 : a particular musical style characteristic of an individual, a group, or an area <the Nashville sound> \n\n\nNoise: \nMain Entry: 1noise \nPronunciation: 'noiz\nFunction: noun\nEtymology: Middle English, from Old French, strife, quarrel, noise, from Latin nausea nausea\n1 : loud, confused, or senseless shouting or outcry\n2 a : SOUND; especially : one that lacks agreeable musical quality or is noticeably unpleasant b : any sound that is undesired or interferes with one's hearing of something c : an unwanted signal or a disturbance (as static or a variation of voltage) in an electronic device or instrument (as radio or television); broadly : a disturbance interfering with the operation of a usually mechanical device or system d : electromagnetic radiation (as light or radio waves) that is composed of several frequencies and that involves random changes in frequency or amplitude e : irrelevant or meaningless data or output occurring along with desired information\n3 : common talk : RUMOR; especially : SLANDER\n4 : something that attracts attention <the play... will make little noise in the world -- Brendan Gill>\n5 : something spoken or uttered\n- noise·less  /-l&s/ adjective\n- noise·less·ly adverb
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Wave length and frequency are inversions.\n\nThe average speed of sound is 343 meters per second.\n\nA 1 meter wavelength then would be a frequency of 1/343 hertz.\n\nA tube will produce most easily a wavelength equal to it's length.  It can also produce a wave length of twice it's length.\n\nAll other tones will be some division of these lengths.\n\nA 12 meter tube would produce wave lengths of 24m (twice the tube) 12m (equal), 6m (half), 4m (a third), 3m (a quarter), 2m (a sixth) etc.  They will all will be completely divisible into the tube.\n\nThat makes frequencies of 12/343 Hz, etc.
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Wavelength (M/C) = Velocity (M/S) / Frequency (C/S)\n\nAmplitude addition/subtraction has to do w/ the relative starting phase/angle of the components & their harmonic relationship.  If they are the same freq w/ the same amplitude in phase the resultant wave has twice the amplitude (+).  However, the same to wave shifted 180degrees apart will result in a flat line (-). \n\nThe following is the formula for complex square wave.  Each component represents a harmonic @ the relative frequency & amplitude compared to the fundamental frequency [Asin(x)]:\n\nSin(x) + 1/3[sin(3X)] + 1/5[sin(5x)]... + 1/n[sin(nx)]\n\nHere the +/- symbols represent relative starting phase.  They are all initially in phase. The rational coeffiecent represents the relative amplitude & the nx represents the relative frequency.
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What you really need a SOUND Lecture.\n\n- Introduction to sound waves, review of basic physics. \n- Review of basic physics; vibrational systems.  \n- Vibrational systems. \n- Waves. \n- Waves, speed of sound. \n- Resonance, harmonic series on strings.  \n- Harmonic series in pipes, sympathetic vibrations.  \n- Hearing.  \n- Logarithms in music, pitch. \n\nand lots more... at\n\nhttp://www.physics.cornell.edu/courses/p204/lectures2006.html
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(1) The Sound is a  physical phenomenon that stimulates the sense of hearing. \n(2) In human beings, hearing takes place whenever vibrations of frequencies between about 15 and 20,000 hertz reach the inner ear.\n(3)  The hertz (Hz) is a unit of frequency equalling one cycle per second. Such vibrations reach the inner ear when they are transmitted through air, and the term sound is sometimes restricted to such airborne vibrational waves. Modern physicists, however, usually extend the term to include similar vibrations in liquid or solid media. Sounds of frequencies higher than about 20,000 hertz are called ultrasonic
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sound is particles vibrating in succesion. waves. \nthere are more particles in iron so the sound is trasnfered faster.