Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Variability: Analysis

Variability: Analysis

Measures of variability are statistical metrics that reveal the dispersion pattern within a dataset. They are pivotal in biostatistics, providing insights into the heterogeneity within health and biological data. Variability signifies the degree to which data points diverge from one another, helping researchers understand the potential range of values and associated uncertainty within the data.
The range is a simple measure of variability, indicating the difference between the highest and...

Average Power

Average Power

In practical electrical applications, the concept of time-varying instantaneous power is not frequently utilized. Instead, focus shifts to the more practical quantity known as average power. Average power is determined by integrating the instantaneous power over a specified time period and subsequently dividing it by that duration.

You might also read

Related Articles

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

Sort by

Same author

Sibilant differentiation before and after tongue cancer surgery: Acoustics, kinematics and the role of sensorimotor controla).

The Journal of the Acoustical Society of America·2026

Same author

Auditory acuity to vowels is more refined in adulthood compared to childhood.

JASA express letters·2026

Same author

Aerodynamic and Acoustic Characteristics of Nasal Airflow in Parkinson's Disease.

Journal of speech, language, and hearing research : JSLHR·2026

Same author

Wideband acoustic immittance: Suitable quantities for assessing middle-ear status.

The Journal of the Acoustical Society of America·2026

Same author

Kinematic and Acoustic Responses to Predictable and Unexpected Auditory Feedback Perturbations in Speakers With and Without Parkinson's Disease.

Journal of speech, language, and hearing research : JSLHR·2026

Same author

Convergent evidence for a pitch deficit in hyperfunctional voice disorders.

JASA express letters·2025

Same journal

Psychometric Rigor Before Clinical or Research Implementation.

Journal of the American Academy of Audiology·2026

Same journal

American Academy of Audiology Health-Related Quality of Life Benefits of Amplification for Adults with Sensorineural Hearing Loss: A Systematic Review Protocol.

Journal of the American Academy of Audiology·2026

Same journal

Evidence Synthesis and Open Science: A Tutorial for Systematic Reviews and Beyond in Audiology Research.

Journal of the American Academy of Audiology·2026

Same journal

State and Trait Anxiety Alter Postural Control in Healthy Adults.

Journal of the American Academy of Audiology·2026

Same journal

Differentiating Superior and Inferior Vestibular Neuritis: Insights from an Integrated VEMP and vHIT Assessment.

Journal of the American Academy of Audiology·2026

Same journal

Test-Retest Reliability of the Triangle Completion Test.

Journal of the American Academy of Audiology·2026

See all related articles

Search research articles

Related Experiment Video

Updated: Apr 23, 2026

Measurement of Carotenoids in Perifovea using the Macular Pigment Reflectometer

Measurement of Carotenoids in Perifovea using the Macular Pigment Reflectometer

Published on: January 29, 2020

Intrasubject variability in power reflectance.

Defne Abur¹, Nicholas J Horton², Susan E Voss¹

¹Picker Engineering Program, Ford Hall, Smith College, Northampton, MA.

Journal of the American Academy of Audiology

|September 27, 2014

Summary

This summary is machine-generated.

Power reflectance measurements show significant individual variability between ears. Deeper probe insertion in the ear canal minimizes measurement variability, crucial for accurate noninvasive middle-ear assessments.

More Related Videos

Applying Hyperspectral Reflectance Imaging to Investigate the Palettes and the Techniques of Painters

Applying Hyperspectral Reflectance Imaging to Investigate the Palettes and the Techniques of Painters

Published on: June 18, 2021

Measuring Spatially- and Directionally-varying Light Scattering from Biological Material

Measuring Spatially- and Directionally-varying Light Scattering from Biological Material

Published on: May 20, 2013

Related Experiment Videos

Last Updated: Apr 23, 2026

Measurement of Carotenoids in Perifovea using the Macular Pigment Reflectometer

Measurement of Carotenoids in Perifovea using the Macular Pigment Reflectometer

Published on: January 29, 2020

Applying Hyperspectral Reflectance Imaging to Investigate the Palettes and the Techniques of Painters

Applying Hyperspectral Reflectance Imaging to Investigate the Palettes and the Techniques of Painters

Published on: June 18, 2021

Measuring Spatially- and Directionally-varying Light Scattering from Biological Material

Measuring Spatially- and Directionally-varying Light Scattering from Biological Material

Published on: May 20, 2013

Area of Science:

Audiology
Biomedical Engineering
Otoacoustic Emissions

Background:

Power reflectance measurements are vital for developing noninvasive middle-ear assessment techniques.
Limited data exists on the test-retest reliability of power reflectance measurements.

Purpose of the Study:

Investigate test-retest characteristics of power reflectance.
Compare intrasubject versus intersubject variability.
Determine the effect of ear-canal measurement location on power reflectance.

Main Methods:

Repeated power reflectance measurements were taken weekly over 4-8 sessions.
Measurements were conducted at three ear-canal locations: deep insertion, 3mm lateral, and 6mm lateral.
Random-effects regression models analyzed data from seven female subjects (ages 19-22).

Main Results:

Significant left-right ear differences in power reflectance were observed in individual subjects across various frequencies.
Intersubject variability in power reflectance was greater than intrasubject variability.
Measurement location impacted power reflectance, with the deepest insertion yielding the smallest intrasubject standard deviation.

Conclusions:

Individual ear differences in power reflectance are common, though population-level differences may not be significant.
Deepest probe insertion minimizes intrasubject variability, reducing acoustic leaks and low-frequency ear-canal losses.
Intrasubject variability was approximately half the magnitude of intersubject variability, highlighting the importance of consistent measurement technique.