Welcome to our website's egophony page. Here we provide a description of egophony and related voiced breath sounds along with clinical significance. We then compare healthy vs abnormal voiced sounds using audio recordings and text. Finally, we provide links to the lung sound training lessons available on this website.
Our lesson can be found in this course. Secondly, our reference index is designed to provide quick access to stridor sounds, with audio tracks, listening guides and waveforms. Use this link for quick reference to heart and lung sounds.
Voiced sounds, such as egophony, can provide important information about the presence of a lung abnormality and its location. The basic idea is that normal lungs (filled with air), do not readily transmit sounds, while consolidated lung tissue more readily transmits sounds. To use egophony during an exam, ask the patient to say 'e' as you auscultate over the chest wall. Over normal lung areas, you will hear the same 'e' tones. Over consolidated tissue, the 'e' sound changes to a nasal quality 'a' (aaaaay), like a goat's bleating. The sound will often become louder over consolidated tissue. The next paragraph and recordings will make this clearer.
Having asked the patient to say 'e' as you auscultate the lungs, you may hear two different sounds as presented below.
The sound is an 'e'.
Listen for 'a' (aaaay).
While we have many breath sound lessons and quick references on this website. Please use the links below.
Two lessons on egophony sounds are part of our Intermediate Lung Sounds course. There are also lessons on bronchophony and whispered pectoriloquy, which are other types of voiced sounds. We suggest taking the full course (about 20 minutes), but the egophony lesson can be used without the full course.
|Intermediate Lung Sounds
The goal of this intermediate course is to expand your observational skills when auscultating breath sounds. The course lessons include voiced sounds: bronchophony, egophony and whispered pectoriloquy. We also provide auscultation lessons on several types of wheezes, crackles and stridor. Each of these lung sound lessons includes audio, text and dynamic waveform. The anatomy pages use illustrations to reveal an example of each lung sound (anatomy not yet available on smartphones).
|1||Vesicular - Diminished|
|2||Bronchophony - Healthy|
|3||Bronchophony - Abnormal|
|4||Egophony - e|
|5||Egophony - a|
|6||Whispered Pectoriloquy - Healthy|
|7||Whispered Pectoriloquy - Abnormal|
|8||Wheeze - Expiratory|
|9||Wheeze - Monophonic|
|10||Wheeze - Polyphonic|
|11||Crackles - Early Inspiratory (Rales)|
|12||Crackles - Late Inspiratory (Rales)|