Ipod- volume issues

Hi

I have my music on my itouch and a second ipod. If find that for many of my songs on the ipod I have to really crank up the volume to hear the music even at a semi audible level. This is worse if I am on a bus or near trafic. Any suggestions to fix this?

try different head phones, or go to the setting and check the master volume, it could be set low.