- The intensity of the sound received varies inversely as the square of the distance R from the source
ie. as 1/R². - In open air, sound will be roughly nine times less intense at a distance of 3m from its origin, as at a distance of 1m.
- Objects in our surroundings produce reflection (echo), absorption and scattering of the sound waves.
- The inverse square law is not always applicable in direct measurements of the intensity of sound.
- However is it a rough indication when you are away from reflecting surfaces eg. open air away from walls.
https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcROog5MFf-KX19hLXmr1EPogyhiJkWqLNlxW5Ssz-C8sZvJxhb0
No comments:
Post a Comment