Good job. Did you know that white noise/instrumental music is the basis for the Edinburgh Masker(EM) speech prosthesis? I have used the EM for years and it has cut my stuttering dramatically. Stuttering is a neurological disorder where the brain does not process the speaker's voice correctly. When you Mask Out your voice, your stuttering will drop dramatically. Keep up the good work and keep using your headphones, and you will be able to make many more great presentations.