This paper describes an interactive gestural microphone for vocal performance named Voicon. Voicon is a non-invasive and gesture-sensitive microphone which allows vocal performers to use natural gestures to create vocal augmentations and modifications by using embedded sensors in a microphone. Through vocal augmentation and modulation, the performers can easily generate desired amount of the vibrato and achieve wider vocal range. These vocal en-hancements will deliberately enrich the vocal performance both in its expressiveness and the dynamics. Using Voicon, singers can generate additional vibrato, control the pitch and activate customizable vocal effect by simple and intuitive gestures in live and recording context.