15 sound Flashcards
1
Q
Definition
Compression
A
A region of higher air pressure compared to the surroundings.
Concentrated lines
2
Q
Definition
Echo
A
A reflection of sound waves from a surface which is heard as a separate sound or series of sounds.
2
Q
Definition
Rarefaction
A
A region of lower air pressure compared to the surroundings.
Spread-out lines
3
Q
Formula
Speed
A
Distance travelled/ Time taken
4
Q
Definition
Reverberation
A
The prolonging of the original sounds.
5
Q
Formula
Speed
Echo
A
v = 2d/ t
t = time taken
2d = distance to wall and back
6
Q
Factors
Pitch
A
Increasing frequency → Higher pitch
7
Q
Factors
Intensity
A
Increasing amplitude → Louder
8
Q
Definition
Ultrasound
A
A type of sound wave with frequencies greater than 20 Hz.
9
Q
Uses
Ultrasound
A
- Sound Navigation and Ranging (SONAR)
- Map ocean floor
- Detect underwater objects
- Ultrasound scanning
- Quality control and continuous monitoring in industries
- Cleaning of jewellery
