There are two units used to measure the loudness of sound, phon and sone. Loudness is considered a subjective measurement which is influenced not only by sound pressure, but the length of the sound.
Continue ReadingPhon is based on sounds heard at a 1000 hertz level. The sound is then rated by the listeners of the sound. If a person says that the sound seems to be around 50 decibles, then it is expressed as 50 phon, which means a 50 decibel sound at 1000 hertz. Sone is based on orchestral sound, where the lowest sound is assigned 40 phons. Each sone doubles in the level, so 40 phons is one sone, 50 phones is two sones and 60 is four sones, continuing all the way up to 100 phons.
Learn more about MeasurementsThe loudness of a sound, or volume of a sound wave, can be determined by the amplitude of the sound wave. Both pitch and volume can affect how "loud" a sound is and how it affects human ears specifically.
Full Answer >To convert from centimeters to inches, you must know the conversion factor between the two units and how to solve basic unit conversion problems. In this case, the factor is 2.54 centimeters per inch, or 0.39 inches per centimeter. Either one can be used to arrive at the same approximate answer.
Full Answer >Converting from 225 pounds to kilograms is pretty simple once you know the conversion factor between the two units and how to set up and solve a standard unit conversion problem. There are 2.2046 pounds in every kilogram, or 0.454 kilograms in every pound. These will need to be written as fractions (2.2046 lbs/1 kg) in order to solve a conversion problem.
Full Answer >The decibel (dB) is the unit used to measure the intensity (I) of sound or noise level, and it is given in terms of a logarithmic function of a ratio of power intensities. In physics, the formula used for decibels is dB = 10 log_{10} (I/I1), where I1 is a reference value called the threshold of hearing intensity. In this equation, it is possible to express the intensity I as a multiple of I1.
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