This is correct voice production. Incorrect tone quality and production can block the hearing so that a singer is unaware of singing flat. This is a real biggie in the inexperienced chorus or quartet man. The first step in correcting the faulty tone is to have the singers open the resonators so that the tone will be supported by the breath. Let's backtrack a minute and talk about resonance and the location of the resonators.
Resonance is the amplification and enrichment of a fundamental tone emanation from the larynx.
The resonators are the pharynx, mouth and nasal cavities. These are shown in Figure 1. The nasal cavity is fixed, while the pharynx and the mouth are capable of special use. More on these will be covered in next month's installment.