I don’t like my laugh because it is very breathy. Can this be changed? If so, who would be the best type of person to help me change this?
Yes, you can change your laughing pattern. I can’t give you specific advice because the first step is to observe what happens physically to cause the breathiness when you laugh. Once you know that, you can decide what to change. You should be able to get help from any voice practitioner who understands breath management and the relationship between the breath and the way the vocal cords come together to produce the sound. You can try speech therapists and/or voice coaches and interview them; ask how they would go about it and why that would work. Choose the person who gives you a plausible answer and then be patient. Changing something like the way you laugh could be a fascinating process, and it might also bring up some surprising issues.