about the only thing you could do is find out what sound adapter you have and update the drivers. there really isn't anything you can do with a laptop.
does it have a plug for an external set of speakers? try that and see how the quality is too, I'm not sure if laptops have those though.
When all else fails...Ham Radio!
I still have the same old HP DV9700T laptop I've had for years...still kickin'