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

Method to measure acoustic impedance and reflection coefficient.

D H Keefe1, R Ling, J C Bulen

  • 1School of Music, Seattle, Washington 98195.

The Journal of the Acoustical Society of America
|January 1, 1992
PubMed
Summary
This summary is machine-generated.

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

[Effects of enriched environments on behavioral development at toddler period of preterm experienced early repeated procedural pain].

Zhonghua er ke za zhi = Chinese journal of pediatrics·2024
Same author

[Clinical characteristics and prognostic factors of breast cancer patients with tumor deposits in the ipsilateral axillary region].

Zhonghua zhong liu za zhi [Chinese journal of oncology]·2024
Same author

Depot buprenorphine as an opioid agonist therapy in New South Wales correctional centres: a costing model.

BMC health services research·2022
Same author

Preoperative MRI of breast squamous cell carcinoma: diagnostic value of distinguishing between two subtypes.

Clinical radiology·2022
Same author

Development, verification, and comparison of a risk stratification model integrating residual cancer burden to predict individual prognosis in early-stage breast cancer treated with neoadjuvant therapy.

ESMO open·2021
Same author

Efficacy and safety of delafloxacin compared with vancomycin plus aztreonam for acute bacterial skin and skin structure infections: a Phase 3, double-blind, randomized study.

The Journal of antimicrobial chemotherapy·2017

A new frequency-domain system accurately measures acoustic impedance and reflection coefficients, even with unknown ear canal size. This method enhances acoustical measurements in human ears.

Area of Science:

  • Acoustics
  • Bioacoustics
  • Physiological Measurement

Background:

  • Accurate acoustic impedance and reflection coefficient measurements are crucial for understanding sound propagation.
  • Existing methods often struggle with precisely known geometries, particularly in biological applications like human ear canal analysis.
  • The Thevenin equivalent circuit model is commonly used to describe acoustic systems.

Purpose of the Study:

  • To develop and validate a frequency-domain system for measuring acoustic impedance and reflection coefficient.
  • To address the challenge of imprecisely known cross-sectional areas in applications like human ear canal measurements.
  • To enable accurate acoustical characterization in environments with variable or unknown geometries.

Main Methods:

Related Experiment Videos

  • A frequency-domain system utilizing least-mean-squares approximation for calibrating source and receiver characteristics.
  • Employing a viscothermal tube model to match measured data from closed, cylindrical tubes.
  • Acoustically estimating the cross-sectional area of the ear canal from impedance data.
  • Calculating the reflection coefficient based on estimated area and impedance.

    • Main Results:

    • The system demonstrates accurate measurements of acoustic impedance and reflection coefficient for closed tubes up to 10.7 kHz.
    • The method successfully estimates the unknown cross-sectional area of tubes, crucial for ear canal applications.
    • Frequency-domain measurements are reliable, though time-domain response accuracy is limited by finite bandwidth.

    Conclusions:

    • The developed frequency-domain system provides an accurate and robust method for acoustical measurements.
    • The technique is particularly well-suited for applications in human ear canals where precise geometry is often unknown.
    • This approach enhances the capability for in-situ acoustical analysis in complex biological systems.