If you have access to a glottograph (also called a laryngograph) in your speech lab, use it to compare different phonation types. See what patterns you get on the screen when you utter a voiced sound (such as [β]), the same sound whispered, murmured, or with creak. Describe the shape of the waves (print them out if possible) and note what each part of the wave signifies in terms of the cycle of vocal fold vibrations.