Pick a specific sound, give the decibels of the sound, and explain what this measurement means.?
397892
The loudness of a sound increases roughly in proportion to the logarithm of energy of the stimulus.\n\nA decibel  is one tenth of a ‘bel’ which was named in honor of Alexander Graham Bell.\n\nAn increase of one ‘bel’ (10 decibels) means making the stimulus energy 10 times as great.\n\nA stimulus of 12 bels is one trillion times as great as a threshold stimulus.\n\nA threshold stimulus delivers 0.0002 dyne per square centimeter.\n\nGentle breeze in trees ---10 decibels.\n\nWhisper-------------------  20 decibels.\n\nOrdinary room------------30 decibels.\n\nOffice room--------------- 40 decibels.\n\nVacuum cleaner----------- 50 decibels.\n\nNormal conversation ---- 60 decibels.\n\nMotor truck ---------------70 decibels.\n\nair plane--------------------110 decibels.\n\nThunder nearby-----------120 decibels. Trillion times as great as a threshold stimulus.\n\nPainful sound---------------130 decibels.\n\n\nThe interval between two  stimuli S1 and S2 is 10 log (S1/ S2) dB.
559713
This related to music ,,, how? 2 pts here.
966327
I agree; c) is the right choice.  The other units are used to measure:\n\na)  power ratio\nb)  pressure\nd)  pressure (again)
835130
The word you're looking for is "measured"..?
416586
DeciBels below 1 Milliwatt) A measurement of power loss in decibels using 1 milliwatt as the reference point. A signal received at 1 milliwatt yields 0 dBm. A signal at .1 milliwatt is a loss of 10 dBm.\n\nOR\n\nDataBase Manager
843905
20 micropascals or 0 Decibels. According to wikipedia, this is about the loudness of a mosquito flying 3m away. That's pretty quiet.\n\nThere is however a frequency dependence, and old people obviously don't hear as well, but 20 micropascals is the standard value.
570504
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.
189567
go 2 control panel,click on Sounds, Speech, and Audio Devices,den clik on sounds and audio devices.den test ypur min volume.first chek whether you got in the rite hole
866698
Check out this website. They discuss both direct and reverb loudness. It seems the steady-state reverb level depends on surface area and absorption coefficient while direct is 1/R^2 dependent. Unfortunately the symbols in their equations are not always defined right below the equation but they will be somewhere on the page. If you see a symbol that looks like 2 vertical sides and the top of a square, it's pi. Also they're not too careful about parentheses. One eq. you'll notice says\nWreverb = Wsource * (1 - a / Sa) but I'm betting it should be (1 - a) / Sa. (Otherwise they're using the fraction a/Sa which reduces to 1/S with 'a' irrelevant). Good luck. Maybe you'll find a more readable site.\nP.S. Of course one major effect you'll notice if your program material extends into the deep bass is a falloff of low-frequency response below about 22 Hz. From the ref., Fcutoff = c / 2 * longest dimension, should be c / (2 * longest dimension).
1133021
D  Bflat, B flat D B flat, Bflat\n\nAh screw it.  Learn to play by ear.
850732
If you can measure the *frequency*, you know the wavelength.\n(As the wavelength is just the frequency divided by the speed of sound.)  I found a calculator that does this for you:\nhttp://www.sengpielaudio.com/calculator-wavelength.htm\n\nIdeally you would get an oscilloscope to measure the frequency.\n\nIf you don't have access to one, if you have a guitar tuner, you could measure the frequency (the tuner will tell you the pitch, say A#, and you can look up the frequency of that pitch in a music book).\n\nOr if you have a bunch of tuning forks or a pitch pipe, you could get an approximation.\n\nIf you have an ocilloscope, don't forget to get the precise speed of sound at your elevation (sound travels a bit faster at sea level, than if you live in, say, Denver).  (Note that the calculator link above gives you a place to enter the speed of sound where you live.)  If you're using a guitar tuner or tuning forks, they are only approximations anyway, so the exact speed of sound for your elevation won't make a difference.  \n\nP.S.  I found a reference to a sound analyzer you can get for your computer!  The software is free, but it needs a soundcard in your computer (which you probably have).  It uses the information from a microphone in your computer to give you the frequency and wavelength of the musical note.  It's kinda cheating if this is for a science-fair project ... but maybe this is what you want.\nhttp://www.relisoft.com/Freeware/freq.html
702125
Write down all relevant variables, and units:\nV = volume in mm^3\nt = time in min\nx = edge length in mm\n\nWhat down what you are told:\ndx/dt = 0.49\nV = x^3\n\nWrite down what you want:\ndV/dt\n\nTo get dV/dt, we need dV/dx and dx/dt. The second one is 0.49, and the first one can be gotten by differentiating the volume equation: dV/dx = 3x^2. Substitute in x = 6.7, and the final answer is \n3*6.7^2 * 0.49 = 65.9883 mm^3 / min (decreasing)
306252
You cannot convert Volume into weight, you need more information.\n=)
941985
Sound is a disturbance of mechanical energy that propagates through matter as a wave. Sound is characterized by the properties of sound waves, which are frequency, wavelength, period, amplitude and velocity or speed.\n\nBy sound, we commonly mean the vibrations that travel through air and can be heard by humans. However, scientists and engineers use a wider definition of sound that includes low and high frequency vibrations in air that cannot be heard by humans, and vibrations that travel through all forms of matter, gases, liquids and solids. The matter that supports the sound is called the medium. Sound propagates as waves of alternating pressure, causing local regions of compression and rarefaction. Particles in the medium are displaced by the wave and oscillate. The scientific study of sound is called acoustics.\n\nNoise and sound often mean the same thing; but noise is often used to refer to an unwanted sound. In science and engineering, noise is an undesirable component that obscures a signal\n\nSound is perceived through the sense of hearing. Humans and many animals use their ears to hear sound, but loud sounds and low-frequency sounds can be perceived by other parts of the body through the sense of touch. Sounds are used in several ways, notably for communication through speech or, for example, music. Sound can also be used to acquire information about properties of the surrounding environment such as spatial characteristics and presence of other animals or objects. For example, bats use echolocation, ships and submarines use sonar, and humans can determine spatial information by the way in which they perceive sounds.\n\nThe speed at which sound travels depends on the medium through which the waves are passing, and is often quoted as a fundamental property of the material. In general, the speed of sound is proportional to the square root of the ratio of the stiffness of the medium and its density. Those physical properties and the speed of sound change with ambient conditions. For example, the speed of sound in air and other gases depends on temperature. In air, the speed of sound is approximately 345 ms-1, in water 1500 ms-1 and in a bar of steel 5000 ms-1.
96815
Don't know about the reference...\n\nWhat I do know: music theory, and the theory of musical scales (particularly the mathematical description of scales) is a formal description of what sounds right (and wrong) to the human ear...
869709
Tell us what you mean, and perhaps we can tell you how to measure it.
659016
Yes, but it is too difficult to explain. Go to realaudio and they will explain it betttter than me!