Yea, air is different when its cold out.. I think you lust have Yelling at people ,left
Or have a VuVuzela from the SA World cup

If one of the big Chinese utility, handlebar bells wont do,
and Air zounds doesn't do it for you, even if you pump up the tank just before you start out.

NB truck horns need a compressor to make the air,
there are non refillable air horns ,
too .. emergency hailing horn heard at football matches ..