The Larynx, Also Known as the Voice Box

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The Larynx, Also Known as the Voice Box

By Your Health Magazine Health Information Team

You wake up with a raspy voice, feel a tickle when you speak, or notice the front of your neck move when you swallow. These everyday experiences involve a small but remarkably busy part of the body: the larynx. If you are wondering what is another name for larynx, the direct answer is the voice box. However, producing your voice is only one of its essential jobs.

What Is Another Name for the Larynx?

The larynx is commonly called the voice box because it contains the vocal folds, also known as vocal cords, that help produce sound. The word “larynx” is pronounced “LAIR-inks.” It is part of the upper airway and sits in the middle of the neck, between the throat, or pharynx, and the windpipe, or trachea.

Although people sometimes use “throat,” “larynx,” and “voice box” interchangeably, they do not mean exactly the same thing. The throat is a broader region that includes the pharynx and nearby structures. The larynx is a specific organ within that region. The trachea begins below the larynx and carries air toward the lungs.

What Does the Voice Box Do?

The larynx supports three activities you rely on throughout the day: breathing, speaking, and swallowing. These functions require its muscles, cartilage, nerves, and vocal folds to work together with precise timing.

It Keeps Air Moving

When you breathe quietly, the vocal folds remain open. Air passes through the nose or mouth, travels through the throat and larynx, and then enters the trachea on its way to the lungs. A disorder that narrows this passage or prevents the vocal folds from opening normally may cause shortness of breath or noisy breathing.

It Produces the Sound of Your Voice

When you speak or sing, air pushed upward from the lungs passes between the vocal folds. The folds come close together and vibrate, creating sound waves. Your tongue, lips, mouth, nose, and throat then shape those sounds into recognizable speech.

The pitch, volume, and quality of a voice depend partly on the size, shape, tension, and movement of the vocal folds. This helps explain why each person’s voice sounds different and why illness, fatigue, aging, or heavy voice use can temporarily change it.

It Helps Protect the Airway

The larynx also helps keep food and liquid out of the windpipe. During swallowing, the larynx moves upward, the vocal folds close, and a flap of cartilage called the epiglottis helps cover the airway entrance. This coordinated action directs what you swallow toward the esophagus rather than the lungs.

An occasional cough after taking a sip too quickly is common. Repeated coughing, choking, or a wet-sounding voice during meals, however, may indicate that swallowing is not working normally and deserves medical attention.

What Parts Make Up the Larynx?

The larynx is supported by several pieces of cartilage connected by muscles, ligaments, and membranes. Clinicians often describe it in three regions:

• The supraglottis is the upper section and includes the epiglottis and structures above the vocal folds.
• The glottis is the middle section containing the vocal folds and the opening between them.
• The subglottis is the lower section extending from beneath the vocal folds to the trachea.

The largest laryngeal cartilage is the thyroid cartilage. Its front edge creates the laryngeal prominence commonly called the Adam’s apple. Everyone has thyroid cartilage, although its shape and visibility vary. Readers interested in this feature can learn more about why women also have Adam’s apples and what their appearance may mean.

Why Does the Larynx Become Irritated?

A hoarse, weak, breathy, or strained voice usually reflects a change in how the vocal folds are moving or vibrating. Laryngitis, which means inflammation of the larynx, commonly occurs with a viral respiratory infection or after prolonged shouting, singing, cheering, or speaking.

Other possible causes of ongoing laryngeal or voice symptoms include:

• Repeated or forceful voice use
• Smoke, chemical fumes, allergens, or other inhaled irritants
• Acid reflux that reaches and irritates the throat
• Benign vocal fold nodules, polyps, or cysts
• Vocal fold weakness or paralysis
• Injury involving the neck or throat
• Neurological conditions that affect muscle control
• Growths or, less commonly, laryngeal cancer

Symptoms alone cannot identify the cause. Hoarseness after a cold may improve as the infection clears, while a persistent or unexplained voice change may require an examination of the larynx.

How Can You Support a Healthy Voice Box?

Simple habits can reduce unnecessary strain and irritation:

• Drink enough fluids to avoid a dry mouth and throat.
• Rest your voice when it is tired, hoarse, or uncomfortable.
• Avoid yelling, prolonged loud talking, and speaking over background noise.
• Use a microphone when addressing a large room rather than forcing your voice.
• Avoid smoking, vaping, and secondhand smoke.
• Limit exposure to dust, fumes, and other respiratory irritants when possible.
• Avoid repeatedly clearing your throat, which can cause the vocal folds to strike together forcefully.
• Discuss frequent reflux symptoms with a healthcare professional.

Whispering is not always restful because some forms of whispering can create additional tension. When the voice is irritated, speaking less and using a comfortable, gentle volume may be preferable to forcing either normal speech or a whisper.

For trustworthy background information on voice disorders, throat concerns, and other medical topics, visit the MedlinePlus health topics directory.

When to Seek Care

Schedule an evaluation if hoarseness lasts longer than about three weeks, particularly when there was no recent cold or flu. Medical attention is also appropriate for recurring voice loss, pain when speaking, frequent choking during meals, difficulty swallowing, a persistent cough, unexplained ear or throat pain, or a new lump in the neck.

Seek prompt or emergency care for difficulty breathing, high-pitched or noisy breathing, coughing up blood, rapidly worsening throat swelling, or an inability to swallow saliva. Children with breathing trouble, drooling, a barking cough, or harsh noisy breathing should receive urgent assessment.

A primary care clinician can provide an initial evaluation. Persistent voice, airway, or swallowing symptoms may be assessed by an otolaryngologist, also called an ear, nose, and throat specialist. A speech-language pathologist may help evaluate voice use or swallowing and provide therapy when appropriate.

The Voice Box Does More Than Create Sound

Another name for the larynx is the voice box, but that familiar term tells only part of the story. This compact organ keeps air moving toward the lungs, helps protect the airway during meals, and turns airflow into the voice you use to speak, laugh, sing, and communicate. Paying attention to persistent changes in breathing, swallowing, or voice can help ensure that laryngeal problems receive timely evaluation.