Hi, It is common knowledge that the speed of sound is greatest in solids, then liquids and finally gases. But just thinking, if all things remain equal, how will the loudness of sound compare in the 3 states? My GUESS is that sound in gases could be the loudest. Loudness is defined as the amplitude of sound waves induced in the eardrums. In gases, the inter particle bonds is very weak, thus the gas particles can progress and strike the eardrums with maximal force, causing large amplitude. However, in solids, inter particle bonds is strong, thus these strong bonds will hold back the solid particles and the solid particles will not strike the ear drums with maximal force. Why do fellow forummers think of my reasoning? Will be very glad to hear from you guys and gals!