problem. 'emitted What frequency strikes the stalactite? stalactite= Hz The stalactite reflects what strikes it (NOT the original pitch). What frequency does the bat then hear coming from the stalactite? fbat = What is the frequency of beats heard by the bat? fbeat= Hz NOTE: The bat hears two things: • The original frequency emitted. • The "double doppler shifted" note from the stalactite Hz
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 bat flying along in a cave at a velocity of Vbat = 4.52 m/s sends out a sound wave of femitted = 59800 Hz. The sound wave reflects off of a stationary stalactite and the bat hears a different frequency than the one he emitted. Use V sound = 346.4 m/s throughout this
problem.
What frequency strikes the stalactite? fstalactite =
Hz
The stalactite reflects what strikes it (NOT the original pitch). What frequency does the bat then hear coming from the stalactite? fbat
What is the frequency of beats heard by the bat? fbeat
Hz
NOTE: The bat hears two things:
●
Vbat
●
The original frequency emitted.
The "double doppler shifted" note from the stalactite.
=
=
Hz](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F159fff52-d937-497f-921f-7e840c9344af%2F65e023ab-677f-456c-ac91-0aa8c5b832e2%2Fei8ba0o_processed.png&w=3840&q=75)
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