We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What Is Bronchophony?

Dan Harkins
Updated Mar 03, 2024
Our promise to you
The Health Board is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At The Health Board, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject-matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

Clinicians often auscultate the lungs, using a stethoscope or other listening device, to hear the sounds the body is making on its own accord. When sound carries perhaps too well through the lungs, this phenomenon is called pectoriloquy. These sounds are broken into several categories, with a certain dynamic called bronchophony. This occurs when normal vocal volume carries without muffling through the lungs, often due to conditions like pneumonia or even cancer.

With the stethoscope on either side of the chest, the seated patient is asked to slowly say the number "99" several times in a row. With normal bronchophony, the words will sound muffled and unable to discern. If the words carry clearly enough to hear audibly, an abnormal bronchophony may be diagnosed.

When the lungs are operating normally, its tissue typically filters out clear noises made by the voice box. These acoustics are diminished when bronchophony has been compromised. This allows the sound to be heard more clearly in lungs. A doctor will rule out this phenomenon if the sound is not distinct enough to make out the number.

Bronchophony is just one of several voice transmission examinations that doctors may use to determine if a patient is having respiratory problems. Another similar test is called the whispered pectoriloquy test. This involves the patient lightly whispering the number "99" several times slowly. If the doctor can clearly hear the number through the stethoscope, the test will come back positive. Otherwise, the number will be inaudible or, at the least, completely indecipherable. Yet another test, called tactile fremitus, has the patient saying "99" while feeling for excessive vibrations over the lungs.

Another test similar to bronchophony tests the lungs for egophony, during which an "EEE" sound translates to an "AAA" sound. Listening over each lung with a stethoscope, the doctor will tell the patient to hold an "EEE" sound in a clear, audible voice. If the sound that is transmitted through auscultation is closer to "AAA," the doctor will suspect egophony.

These tests can provide at least a tentative diagnosis of lung consolidation in which the lungs fill with fluid. This could be caused by pneumonia, but other conditions, such as asthma and even cancer, can cause it. To confirm the diagnosis, an x-ray of the lungs will be able to identify the location and severity of the consolidation.

The Health Board is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Link to Sources
Dan Harkins
By Dan Harkins
Dan Harkins, a former military professional, brings his diverse life experiences to his writing. After earning his journalism degree, he spent more than two decades honing his craft as a writer and editor for various publications. Dan’s debut novel showcases his storytelling skills and unique perspective by drawing readers into the story’s captivating narrative.
Discussion Comments
Dan Harkins
Dan Harkins
Dan Harkins, a former military professional, brings his diverse life experiences to his writing. After earning his...
Learn more
The Health Board, in your inbox

Our latest articles, guides, and more, delivered daily.

The Health Board, in your inbox

Our latest articles, guides, and more, delivered daily.