sound waves Flashcards
what type of waves a this
a longitudinal wave
does it require a medium to propagate
yes it requires a medium to propagate form one point to another
what does the loudness of a sound depend on
amplitude
what does the pitch of a sound depend on
frequency
what is a musical note
a regular vibration produces a musical note
what is noise
irregular vibrations make a noice
what contributes to noice
a lot of different frequencies
what is loudness of sound measured in
decibels (dB)
what is the max loudness the eardrum can withstand
120dB
what does anything beyond 120dB lead to
leads to damage of the eardrum
what leads to permanent damage
140dB
human eardrum can process frequencies up to what
human eardrum can process frequencies up to 20KHz
beyond 20KHz frequencies are referred to as what
they referred to as ultrasounds q
what are ultrasounds used n the medical field for
view developing foetus
determine blood speed
determine heartbeat of foetus
explain how sound travels in different mediums
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