Threshold of pain 120 phons 120 1 100 100 10-2 80 80 10-4 60 60 10–6 40 Threshold of hearing 40 10-8 20 20 10-10 10-12 20 50 100 500 1000 5000 10,000 Frequency (Hz) FIGURE 12-6 Sensitivity of the human ear as a function of frequency (see text). Note that the frequency scale is "logarithmic" in order to cover a wide range of frequencies. Sound level (dB) Intensity (W/m²)

Q: (a) (i) State what is meant by the specific acoustic impedance of a medium. (ii) The density of a…

A: (a) (I) to define the specific acoustic impedance of a medium. (ii) to calculate the specific…

Q: How far away could you still detect a sound source with 100 mW of acoustic power released for 0.010…

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A:

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A: Intensity of sound due to rocket engine (I) = 2.43×10-5 Wcm2

Q: (a) A standing wave is oscillating on a string that is attached between two fixed points. If the…

A: Hi there! Since there are multiple questions posted and it is not mentioned what is to be answered,…

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Q: Estimate the ratio of Bs(water)/ Bs(air) knowing approximately their ratio of mass densities and the…

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A: Hai, since there are multiple questions posted, we will answer the first question. The equation for…

Shock Waves

Shock waves are common in continuum mechanics, and their dominance is attributable to the fact that they are stronger (or even less) compressible. Substantial perturbations propagated as sudden dynamic changes of a compressible medium supersonically. Shock waves are all around us in our daily lives. Lightning, earthquakes, volcanic eruptions, and meteorite impact all produce them in nature. Even the earth, which is protected by its magnetic field, generates a shock wave as in solar wind that travels around 20 Earth radiuses. These shock waves might be either constant, linked to the body, or unsteady, i.e., moving around with time. All of the shocks mentioned above can be damaging, so precautions must be taken to reduce their impact.