Sound Flashcards
What is sound
A compressional wave that travels through air using compressions abs rare fractions
What is a medium
Gas
Solid
Liquid
Why does sound travel faster in solids
The denser the medium the faster sound travels
Explain why sound moves faster in warmer air
Higher the temperature the faster the vibrations
How is an echo produced
When sound waves reflect from a hard surface
What is CRO
Cathode ray oscilloscope
What does a CRO do
Converts sound waves into electrical signals that can be seen as transverse waves
What is the relationship between volume and amplitude
High amplitude=high volume
How is pitch related to frequency
High frequency = high pitch
What is the human hearing range
20hz - 20,000hz
What is infrasound
Frequency below 20hz
What is ultrasound
Frequency above 20,000hz
When is ultrasound used
Sonograms
Echolocation
What does SONAR mean
Sound navigation and ranging
What is the calculation for SONAR
Distance = t x s divide 2
