sound waves Flashcards
(8 cards)
1
Q
Are sound waves transverse or longitudinal?
A
Longitudinal
2
Q
At night, a bat emits a series of sounds which bounce off objects and then return to the bat. The bat uses these to work out the location of objects, and so can avoid them. What is the name of this method used by the bat?
A
Echolocation
3
Q
Can humans hear ultrasound waves?
A
No
4
Q
Whats the lowest frequency humans can hear.
A
20Hz
5
Q
Whats the highest frequency humans can hear
A
20,000Hz
6
Q
Is the frequency of ultrasound waves higher, lower or the same as the upper limit of human hearing?
A
Higherw
7
Q
What is the highest frequency of sound (in kilohertz) that the average child can hear?
A
20kHz
8
Q
True or false? Ultrasound cannot be detected by the human ear but other animals like dogs and bats can hear it.
A
True
