If you can control the resonance chamber, you will get a great voice!

The source or creation of sound is the vocal cord and the production of that sound is made in the resonance chamber. These are the most important factors of voice.
If you can learn to understand and fully control the resonance chamber, you will get great voice.
People have five main resonance chambers, and mobility is important for each part.
The bigger the space, the better the sound. The right positioning combined with the muscles moving smoothly, determine the ease of mobility. If these two things function properly, you can more easily display a high quality voice.
The following figure shows 1:laryngeal ventricle 2: piriform recess 3:pharyngeal cavity 4:oral cavity 5:nasal cavity.


(1)Laryngeal ventricle
This makes basic sounds, and helps in making and fluctuating the sound’s pitch.
Although it is true that the pitch is also made by expanding and contracting the vocal cord, the pitch is tuned finely between the false vocal cords (vestibule) in the laryngeal ventricle.
(2)Piriform recess
This makes the space to send the food to the esophagus. It also sends air to the glottis and can be compared to a tree branch.
The size of the piriform recess depends on the size and shape of the thyroid cartilage, and is also affected by the thickness of the soft tissue in the larynx.
Bigger thyroid cartilage makes more space in the piriform recess and possibly makes more resonant sounds.
The piriform recess is an inborn part, you can never change the size of it after being born.
(3)Pharyngeal cavity
This part decides the tone color of the voice. Tone color is what allows the listener to identify a sound as being produced by a specific person or instrument. Understanding and recognizing tone color also helps people differentiate between sounds produced by instruments of the same type. For example a saxophone sounds very different than a trumpet, even when they play a tone at the same frequency, volume and duration. And one trumpet’s quality of sound may sound very different than another trumpet. The same is true with voices and every voice has tone color.
I’ve studied and listened to the voices of many singers. Some of whom have a big pharyngeal cavity, that have shown the ability to control and move it easily which assists in making a high quality voice.
It is widely known as, ‘the opening of the throat,’ this saying actually refers to the action of making the pharyngeal cavity bigger or wider.
People also sometimes say, ‘to put the throat forward,’ but in fact there is no muscle that technically can move the throat forward.
Professional singers that can open their throat very well have really flexible muscles around the larynx.
They cannot check the flexibility of the larynx by themselves, and they often do not know how open their throat exactly.
It’s not easy to open the throat without having flexible muscles around the larynx. However, these singers have acquired these flexible muscles by practiced technical stretching.
(4)Oral cavity
This makes the final adjustments to all sounds and words. The role of the tongue is also relevant to the oral cavity.
The oral cavity is different from the larynx and the pharynx, being it’s a lot easier to control.
The hyoid bone is in proportion to the kinematic performance of the suprahyoid muscles. This process is really important for speaking smoothly.
The hyoid bone is in the shape of a “U” and supports the tongue. The hyoid bone floats in the air, if this gets in deep it may cause pressure. This pressure on the tongue obstructs the tongue by preventing it from moving smoothly. By doing this the space in the mouth is changed by contracting and expanding the suprahyoid muscles. The role of the suprahyoid muscles is important because most people cannot lift up the soft palate easily.
(5)Oral cavity
If you let out your voice by pinching your nose, the sound is going to be closed.
The oral cavity a the central part used to take in and let out air.
Generally, your voice is going to be hoarse if a lot of air comes out from the mouth. This is because the mouth can expel more air than the nose, due to the passage size differences.