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

Inaccuracies in sound pressure level determination from room impulse response.

Dejan G Cirić1, Miroslava A Milosević

  • 1Faculty of Electronic Engineering, University of Nis, Yugoslavia. dciric@elfak.ni.ac.yu

The Journal of the Acoustical Society of America
|February 8, 2002
PubMed
Summary

Finite integration limits and noise introduce inaccuracies in sound pressure level (SPL) calculations. Optimizing the integration upper limit (UL) and applying compensation methods can significantly reduce these errors for room impulse response (RIR) analysis.

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

Automated estimation of the truncation of room impulse response by applying a nonlinear decay model.

The Journal of the Acoustical Society of America·2016
Same author

Coupling of earphones to human ears and to standard coupler.

The Journal of the Acoustical Society of America·2006
See all related articles

Area of Science:

  • Acoustics
  • Signal Processing
  • Room Acoustics

Background:

  • Sound pressure level (SPL) calculation relies on integrating room impulse response (RIR).
  • Finite integration upper limits (UL) and inherent noise can cause inaccuracies in SPL determination.
  • Understanding these influences is crucial for accurate acoustic measurements and simulations.

Purpose of the Study:

  • To investigate the impact of finite integration upper limits (UL) and noise on SPL calculations.
  • To evaluate the effectiveness of different UL strategies and noise reduction techniques.
  • To provide guidelines for accurate SPL determination in room acoustics.

Main Methods:

  • Analysis of SPL inaccuracies using simulated and measured room impulse responses (RIRs).

Related Experiment Videos

  • Investigation of different integration upper limit (UL) placements (T/3, T/4, knee, optimal UL).
  • Evaluation of noise subtraction and finite UL compensation methods.

    • Main Results:

    • Acceptable SPL inaccuracies are achieved with UL at T/3 or T/4 for RIRs with low noise floors (below -15 to -20 dB).
    • Setting UL at the 'knee' (decay intersection with noise floor) offers a general solution.
    • An 'optimal UL' slightly before the knee further minimizes inaccuracies.
    • Noise subtraction and UL compensation effectively reduce errors.

    Conclusions:

    • The choice of integration upper limit (UL) and noise management are critical for accurate SPL calculations from RIRs.
    • Specific UL strategies and compensation techniques can significantly mitigate inaccuracies caused by finite integration and noise.
    • Recommendations are provided for optimizing SPL determination in practical acoustic analysis.