Sound is detected when a sound wave causes the tympanic membrane (the eardrum) to vibrate (see the figure (Figure 1)). Typically, the diameter of this membrane is about 8.40 mm in humans.
a)How much energy is delivered to the eardrum each second when someone whispers (19.5 dB ) a secret in your ear? (in Joule)
b)To comprehend how sensitive the ear is to very small amounts of energy, calculate how fast a typical 2.50 mg mosquito would have to fly (in mm/s) to have this amount of kinetic energy. (in mm/s)
Sound is detected when a sound wave causes the tympanic membrane (the eardrum) to vibrate (see...
A fan at a rock concert is 42.2m from the stage, and at this point the sound intensity level is 114.9dB . Sound is detected when a sound wave causes the tympanic membrane (the eardrum) to vibrate . Typically, the diameter of this membrane is about 8.4mm in humans 1.How much energy is transferred to her eardrums each second ? 2.How fast would a 2mg mosquito have to fly to have this much kinetic energy? 3. How fast a typical...
12) The diddley bow is an instrument which consists of a single-string tensioned between two points on a board, often using a glass bottle (see figure) for a bridge and a way to amplify the instrument's sound. The speed of sound in air is v = 343 m/s. a) What tension (in N) is required in a string with mass-per-unit-length u = 1 g/m to produce a fundamental frequency of G, or 49 Hz, if the length is L =...