Speed increases, minimum distance increases
Answer: Speed increases, minimum distance increases.
Speed: Higher temperature = faster air molecules = faster sound travel.
Echo Distance: Because sound is traveling faster, it covers more ground in the 0.1 seconds required for the human ear to distinguish an echo. Therefore, the reflecting surface must be further away.
Example: At 0°C, the minimum distance for an echo is about 16.5 meters. At 25°C, it increases to about 17.3 meters.
Important Questions from Sound
We hear an echo due to
- What is required for the generation of a sound wave?
An infrasound microphone enables the remote detection of aircraft wake vortices, clear air turbulence, tornadoes, and seismic events at frequencies below:
- Which of the following is an example of a longitudinal wave?
What is the relation between the speed of sound (v), its wavelength ( \(\lambda \)) and time period (T)?
