Having necessary twang in your voice when singing or speaking is vital for healthy voice use and projection.
“The area above the vocal cords forms a funnel; this is called the ‘epiglottic funnel’. When twanging, the opening of the epiglottic funnel is made smaller by bringing the arytenoid cartilages closer to the lower part of the epiglottis (the petiole).
As a result, the sound gets clearer and non-breathy, and you can increase your volume. You always need to use necessary twang in order to have the correct technique and achieve easy and unhindered use of the voice regardless of the mode, sound colour and effect used.
Necessary twang makes it easier to sing in all ways. For many, this necessary twang does not sound twanged at all.”