What is a sound?

Edit Answers
YJOPYNZFYGRCPKQWTGVX XPDTZKBIFLXKIJBLTURC JDRCOTNUMCLBTOMUSICG QXWWLIUSWSBXFUGEWDLQ IJBGPVGYQCVTTXPTHFBV OBDJCHNKSPTGXJGVRYLT GPVXMVLZMTGDVWOAOPSR UKDEPFSDNWSXKCESDAFC KXPKHMMNABHOVHLOWBEA JFAXXGQUNZVSWSVIIWAI SOYLGAQOWRIMHVXICZPD OTOSFKLSNCBEIJBEWDYY UFKYFBSROPRTSRECHTRM VXOVGZHLITAOTBIRWHOW YGGWSOXVSHTNLPVUAVTT WFUQMUZSEZILELSOYPIX AUZTRNIARBOQKTSSZWDC VIFGPHCTIPNMPHGIHSUW ENQJVKNXGNSKJZIFDAAV SRAERECAPJQCTQIQJQCT
1.
ear
2.
sound
3.
auditory
4.
brain
5.
whistle
6.
waves
7.
vibrations
8.
pitch
9.
high
10.
low
11.
note
12.
noise
13.
music
14.
hear
15.
source