Things You'll Need
Instructions
Find a small plastic pocket comb. The best type of comb will be about 6 inches long and have medium to fine, springy plastic teeth.
Measure out a sheet of wax paper approximately as long as the comb and slightly wider than twice the width of the comb. Wax paper is used because it is light enough to vibrate like tissue paper but will not get wet and become damaged by the moisture of your mouth.
Fold the wax paper in half along its width and place the comb inside, teeth downward. Hold the wax paper together and press it against the comb at one end, using your thumb and forefinger to keep it pressed.
Raise the comb and wax paper to your lips. Purse your lips and hum so that the vibrations of the lips are in contact with the wax paper at the back of the comb.
Listen to the quacking sound the vibrating comb and wax paper make. Remember, the items are not "making" the sound but merely amplifying and distorting the sound made by your lips. So listen to the noises of the ducks you are trying to call and try to mimic their sounds through the comb and wax paper.
Attach a very small amount of glue to where the two sides of the wax paper meet and press the two sides together. This will connect the two sides of the paper and make the comb duck call slightly more durable.