Have you considered adding an audio message to your squeeze page?

Adding an audio message to your squeeze page allows you to add another level of personality and trust. Not everyone who visits your page will listen to your audio, but those who enjoy audio will certainly be more inclined to sign up as a result.

You don't have to make your audio intrusive. In fact, you can simply include a very small area where it's obvious that audio is available if people want.

You may not want to have the audio play automatically, because some people may be startled. Others may open your website in a place where they are not able to listen to it at that point in time–like at work.

Obviously it wouldn't help your conversion rate to have people clicking away from your site before the boss catches them!