A mosquito emits a 1000 Hz sound. At a distance of 10.0 m from the mosquito, the sound is at the threshold of hearing. (a) What is the intensity of the sound at the threshold of hearing? (b) What is the acoustical power of the mosquito? (c) What is the intensity and intensity level of the sound when the mosquito is 10.0 cm from an observer’s ear?
Properties of sound
A sound wave is a mechanical wave (or mechanical vibration) that transit through media such as gas (air), liquid (water), and solid (wood).
Quality Of Sound
A sound or a sound wave is defined as the energy produced due to the vibrations of particles in a medium. When any medium produces a disturbance or vibrations, it causes a movement in the air particles which produces sound waves. Molecules in the air vibrate about a certain average position and create compressions and rarefactions. This is called pitch which is defined as the frequency of sound. The frequency is defined as the number of oscillations in pressure per second.
Categories of Sound Wave
People perceive sound in different ways, like a medico student takes sound as vibration produced by objects reaching the human eardrum. A physicist perceives sound as vibration produced by an object, which produces disturbances in nearby air molecules that travel further. Both of them describe it as vibration generated by an object, the difference is one talks about how it is received and other deals with how it travels and propagates across various mediums.
A mosquito emits a 1000 Hz sound. At a distance of 10.0 m from the
mosquito, the sound is at the threshold of hearing.
(a) What is the intensity of the sound at the threshold of hearing?
(b) What is the acoustical power of the mosquito?
(c) What is the intensity and intensity level of the sound when the mosquito is 10.0 cm from an observer’s ear?
(d) How many identical mosquitoes would there have to be at a distance of 10.0 m for them to sound as loud as one mosquito at a distance of 10.0 cm?
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
