Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

About egophony

J D Sapira1

  • 1St. Louis University, Missouri, USA.

Chest
|September 1, 1995
PubMed
Summary
This summary is machine-generated.

Egophony, a change in lung sound timbre, results from altered sound wave frequencies. Understanding this phenomenon clarifies learning difficulties and false positives in clinical assessments.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

The medical complications of drug addiction and the medical assessment of the intravenous drug user: 25 years later.

Annals of internal medicine·1993
Same author

Words--10 years later.

Southern medical journal·1993
Same author

Endocarditis in drug abusers.

Southern medical journal·1992
Same author

The whole patient is not less than the sum of his parts.

Psychosomatic medicine·1992
Same author

On violating Occam's razor.

Southern medical journal·1991
Same author

Earlobe creases and macrophage receptors.

Southern medical journal·1991
Same journal

Independent Prognostic Contributions of Anti-Ro52 and Anti-MDA5 in Autoimmune-Associated Interstitial Lung Disease.

Chest·2026
Same journal

Lung aeration and gas exchange in SGA or AGA infants with moderate-severe BPD: secondary analysis of the PATH-BPD study.

Chest·2026
Same journal

Lung Cancer Incidence and Mortality after Negative Low-Dose CT Screening Results.

Chest·2026
Same journal

Symptom prevalence and impact on lung cancer risk in the SUMMIT study.

Chest·2026
Same journal

How I Do It: De-escalation of Prostacyclin-Based Therapy in Patients Treated With Sotatercept.

Chest·2026
Same journal

Eisenmenger Syndrome: The Pulmonology Perspective.

Chest·2026
See all related articles

Area of Science:

  • Pulmonary Medicine
  • Acoustic Physics

Background:

  • Egophony is characterized by a change in vocal resonance timbre from 'Ee' to 'A', without alterations in pitch or volume.
  • This acoustic phenomenon is primarily observed during auscultation of the lungs.

Discussion:

  • The underlying mechanism involves a decrease in the amplitude and an increase in the frequency of the second formant.
  • This occurs when solid material, such as compressed lung tissue, is situated between the sound source (resonator) and the stethoscope.

Key Insights:

  • The physical explanation clarifies why egophony is difficult to learn and why certain physiological conditions can mimic its presence (physiologic false positives).
  • Understanding the acoustic basis of egophony is crucial for accurate clinical diagnosis and interpretation of lung sounds.

Related Experiment Videos

Outlook:

  • Further research could explore advanced acoustic analysis techniques to objectively quantify egophony.
  • Educational strategies incorporating acoustic principles may improve the teaching and learning of this diagnostic sign.