Decibel Portfolio Essay -- essays research papers

The vehemence I of a sound wave is heedful in watts per metre squared ( ). The lowest bulk take that the average human spindle stern detect, i.e. the doorway of hearing, is denoted by , where . The loudness of sound, i.e. its intensity level , is measured in decibels (dB), where . From this function a specific relationship between and substructure be drawn that holds true for any increase in intensity. By knowing the value of beta ( ), the value of can be bring via manipulation of the logarithmic function, and by knowing the value of beta can by found by just taking the log of and multiplying it by ten. The intensity level of ordinary conversation is 65 dB. In coiffure to knock the intensity of normal conversation on essential scar beta to 65 dB and to . Afterwards, via using the division property of par iodin joins like terms. Once the logarithm is alone, one can founder the properties of logarithms and separate the logarithm into two logarithms. The quotient rule for logarithms is applied to this equation, , where and . By the description of the logarithmic function, if and only if , one knows that in order to cancel by the logarithm one must exponentiate the log to ten. When one does this one must also keep in mind that equality must be kept on both sides of the equation, so the -5.5 becomes the exponent of ten. After doing this, one knows that.dB .If one wanted to find the intensity of the sound inner(a) and automobile travelling at that has an intensity level of 75 dB one would follow the same procedure mentioned previously to find intensity. In addition to this method one can use a graphing figurer in order to make the finding of I simpler. By following(a) the procedure one can use a Ti-82 graphing electronic computer to find the intensity I of a sound by knowing the intensity level b. The function used is just all the steps followed in a higher place summarized into one function.EnterENTERBy the use of the calculator, one finds t he refuse response in a quicker fashion than by work the problem out. However, in order to prove that the answer provided by the calculator is correct one should always work out the problem by hand.dB Source of SoundIntensity Level (dB)... ...even though the has changed, if the intensity level increases by ten units, then the intensity increases ten times. When me and my weenie cross a busy street the noise does not look equally loud to both of us. This because the dog has a higher threshold of hearing than me. This is explained best by the fact that the graph for the intensity level in terms of intensity for dogs is translated ten units up from the one for humans. The erect translation signifies that for any given intensity, the intensity level is ten dB more for dogs than for humans.Knowing the relationship between intensity I and the intensity level b is very important to understanding how all beings hear. By understand the relationship, we know that the threshold of somet hings hearing is what affects loudness with which it hears the sound. Furthermore, by understanding the relationship we know that the curve for the relationship will always have the same shape, but the only difference will be that for different thresholds, it will be translated along the Y-axis. Throughout this project, it was researched how to use properties of logarithms in order to assist one in finding intensity by knowing intensity level,