Assume that the opening of the ear canal has a diameter of 7.0 mm. For this problem, you can ignore any focusing of energy into the opening by the pinna, the external folds of the ear.a. How much sound power is “captured” by one ear at 0 dB, the threshold of hearing?b. How much energy does one ear “capture” during 1 hour of listening to a lecture delivered at a conversational volume of 60 dB?

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Stretched string

A stretched string is a wire which is made up of any metal that must have a larger length compared to its thickness. The ends of the wire are fixed, and when they oscillate or are plucked, it produces two reflected transverse waves of the same frequency and same amplitude. The waves or pulses are traveling in alternate directions and superimpose with one another. This waveform is named standing or stationary waves.