Physiological structures that enable the voice

In the world of public speaking, the voice is our main tool to communicate. Behind every word and vocal expression, there are physiological structures that allow the production of sound. In this session, we will explore the main structures involved in the generation of the human voice, understanding how they work and the importance of caring for and properly using these structures to achieve effective communication.

The vocal cords

The vocal cords are two muscular folds located in the larynx. When breathing, they are held open to allow air to pass into the lungs. However, when we speak or sing, the vocal cords partially close, creating a tension that generates vibration as air passes through. This vibration produces the vocal sound. It is important to keep the vocal cords healthy and well hydrated to avoid problems such as hoarseness or dysphonia.

The larynx

The larynx is a box-like structure that contains the vocal cords and other components important for voice production. It acts as a sort of "sounding board" for vocal sound. By modulating the size and shape of the larynx through the muscles surrounding it, we can vary the pitch and quality of our voice. The larynx also plays a crucial role in protecting the airway during swallowing and the production of sounds such as laughing or crying.

The oral and nasal cavity

The voice is not only generated in the vocal cords and larynx, but is also shaped and amplified by the buccal and nasal cavities. These cavities act as resonators, modifying the quality and timbre of the vocal sound. The way we articulate sounds and use our lips, tongue and palate to modulate the flow of air through these cavities directly affects the clarity and projection of our voice. It is essential to maintain good oral and nasal hygiene to ensure optimal functioning of these structures.

The diaphragm and respiratory muscles

Voice production is also closely linked to the respiratory system. The diaphragm, a dome-shaped muscle located beneath the lungs, is primarily responsible for controlling breathing. When inhaling, the diaphragm contracts and moves downward, allowing the lungs to fill with air. On exhalation, the diaphragm relaxes and moves upward, pushing air into the vocal cords and generating the airflow necessary to produce vocal sound. Diaphragmatic breathing training is essential to maintain a stable, controlled and well-projected voice.

Remember that the voice is a valuable tool, and its correct use allows us to convey emotions, impact our audience and connect effectively. By understanding the physiological structures involved in voice production, we can improve our vocal technique, optimize our communication skills and excel in the art of public speaking.