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 Concept Videos

Perceiving Loudness, Pitch, and Location01:21

Perceiving Loudness, Pitch, and Location

691
The human brain perceives pitch through two primary mechanisms reflected in place theory and frequency theory. Each mechanism describes how sound waves are interpreted as specific pitches by the brain, offering insights into the intricate processes of auditory perception.
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by...
691
Sound Intensity Level00:53

Sound Intensity Level

4.6K
Humans perceive sound by hearing. The human ear helps sound waves reach the brain, which then interprets the waves and creates the perception of hearing. The loudness of the environment in which a person is located determines whether they can distinguish between different sound sources.
The human ear can perceive an extensive range of sound intensity, necessitating the use of the logarithmic scale to define a physical quantity—the intensity level. It is a ratio of two intensities and...
4.6K
Design Example: Vintage Mixing Console01:17

Design Example: Vintage Mixing Console

426
A sound engineer at a music company recently encountered a problem. The output from their newly acquired studio's vintage mixing console was too low for the requirements of modern recording equipment. To rectify this situation, the engineer decided to design an audio pre-amplifier using an operational amplifier (op-amp) to boost the signal level.
The specifications for the pre-amplifier were clear. It needed to amplify the audio signal by a factor of 10, have an input impedance above 10...
426
Sound as Pressure Waves01:17

Sound as Pressure Waves

2.9K
Sound waves, which are longitudinal waves, can be modeled as the displacement amplitude varying as a function of the spatial and temporal coordinates. As a column of the medium is displaced, its successive columns are also displaced. As the successive displacements differ relatively, a pressure difference with the surrounding pressure is created. The gauge pressure varies across the medium.
The pressure fluctuation depends on the difference in displacements between the successive points in the...
2.9K
Sound Intensity00:58

Sound Intensity

4.5K
The loudness of a sound source is related to how energetically the source is vibrating, consequently making the molecules of the propagation medium vibrate. To measure the loudness of a source, the physical quantity of interest is the intensity. This is defined as the energy emitted per unit of time per unit of area perpendicular to the sound wave's propagation direction. Since the total energy is greater if the source vibrates for a longer duration and over a larger area, dividing the...
4.5K
Load-frequency control01:28

Load-frequency control

417
Load-frequency control (LFC) is vital for maintaining power system stability, ensuring that frequency and power flows remain within acceptable limits during load changes. Turbine-governor control eliminates rotor accelerations and decelerations following load changes. However, a steady-state frequency error persists when the change in the turbine-governor reference setting is zero. In an interconnected power system, each area agrees to export or import a scheduled amount of power through...
417

You might also read

Related Articles

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

Sort by
Same author

Absorption and scattering by perforated facings with periodic narrow slits.

The Journal of the Acoustical Society of America·2022
Same author

Spatial reconstruction of sound fields using local and data-driven functions.

The Journal of the Acoustical Society of America·2022
Same author

Spatial reconstruction of the sound field in a room in the modal frequency range using Bayesian inference.

The Journal of the Acoustical Society of America·2022
Same author

Hybrid analytical-numerical optimization design methodology of acoustic metamaterials for sound insulation.

The Journal of the Acoustical Society of America·2021
Same author

Gaussian processes for sound field reconstruction.

The Journal of the Acoustical Society of America·2021
Same author

Isotropy in decaying reverberant sound fields.

The Journal of the Acoustical Society of America·2020
Same journal

High-resolution depth estimation for multiple wideband sources in deep sea via sparse Bayesian learninga).

The Journal of the Acoustical Society of America·2026
Same journal

Depression markers in speech: An approach based on tract variables dynamics.

The Journal of the Acoustical Society of America·2026
Same journal

The oyster toadfish (Opsanus tau) alters active and diurnal calling amid vessel noise in New York City.

The Journal of the Acoustical Society of America·2026
Same journal

Experimental noise characterisation of phase-locked tandem-rotor in edgewise flight.

The Journal of the Acoustical Society of America·2026
Same journal

The tune-text-temporal synergy: Prosodic effects of final segmental weakening in Neapolitan.

The Journal of the Acoustical Society of America·2026
Same journal

Monitoring vessel movement above critical offshore infrastructure using distributed acoustic sensing.

The Journal of the Acoustical Society of America·2026
See all related articles

Related Experiment Video

Updated: Dec 2, 2025

Sound Source Localization Testing in Single-sided Deafness Following Bone Conduction Intervention
04:32

Sound Source Localization Testing in Single-sided Deafness Following Bone Conduction Intervention

Published on: December 20, 2024

673

Large-scale outdoor sound field control.

Franz M Heuchel1, Diego Caviedes-Nozal1, Jonas Brunskog1

  • 1Acoustic Technology Group, Department of Electrical Engineering, Technical University of Denmark, 2800 Kongens Lyngby, Denmark.

The Journal of the Acoustical Society of America
|November 3, 2020
PubMed
Summary
This summary is machine-generated.

This study demonstrates effective low-frequency sound control for loudspeakers over large areas, even in changing weather. A model-based approach improves efficiency and robustness for outdoor noise mitigation.

More Related Videos

A Comparative Study of Drug Delivery Methods Targeted to the Mouse Inner Ear: Bullostomy Versus Transtympanic Injection
09:18

A Comparative Study of Drug Delivery Methods Targeted to the Mouse Inner Ear: Bullostomy Versus Transtympanic Injection

Published on: March 8, 2017

13.7K
Real-Time Proxy-Control of Re-Parameterized Peripheral Signals using a Close-Loop Interface
11:54

Real-Time Proxy-Control of Re-Parameterized Peripheral Signals using a Close-Loop Interface

Published on: May 8, 2021

4.9K

Related Experiment Videos

Last Updated: Dec 2, 2025

Sound Source Localization Testing in Single-sided Deafness Following Bone Conduction Intervention
04:32

Sound Source Localization Testing in Single-sided Deafness Following Bone Conduction Intervention

Published on: December 20, 2024

673
A Comparative Study of Drug Delivery Methods Targeted to the Mouse Inner Ear: Bullostomy Versus Transtympanic Injection
09:18

A Comparative Study of Drug Delivery Methods Targeted to the Mouse Inner Ear: Bullostomy Versus Transtympanic Injection

Published on: March 8, 2017

13.7K
Real-Time Proxy-Control of Re-Parameterized Peripheral Signals using a Close-Loop Interface
11:54

Real-Time Proxy-Control of Re-Parameterized Peripheral Signals using a Close-Loop Interface

Published on: May 8, 2021

4.9K

Area of Science:

  • Acoustics
  • Environmental Engineering
  • Signal Processing

Background:

  • Controlling low-frequency sound from loudspeakers in large outdoor areas presents significant challenges.
  • Varying atmospheric conditions can drastically affect sound propagation and the performance of active noise control systems.
  • Traditional methods require extensive measurements, limiting practical application.

Purpose of the Study:

  • To experimentally investigate the feasibility and performance of active low-frequency sound control under varying atmospheric conditions.
  • To develop and validate a model-based approach for efficient sound control over large areas.
  • To assess the robustness and applicability of the proposed method for outdoor noise mitigation.

Main Methods:

  • Utilized a control subwoofer array to cancel sound from a primary subwoofer array over distances of ~100m and areas of ~320m² using the pressure-matching method.
  • Introduced and in situ fitted a sound propagation model to account for loudspeaker radiation properties and variations in the speed of sound, reducing the need for extensive field measurements.
  • Compared the model-based control strategy with direct measurement-based control.

Main Results:

  • Achieved sound pressure level reductions of up to 15-20 dB within the subwoofer frequency range.
  • Demonstrated that sound reduction performance is influenced by specific atmospheric conditions.
  • The model-based approach required fewer microphone locations, showed comparable reduction performance to direct measurement control, and proved more robust.
  • Enabled acoustic energy reduction in virtual control zones distant from measurement points.

Conclusions:

  • The developed model-based active sound control methodology is effective for low-frequency noise mitigation in large outdoor spaces.
  • This approach offers a more robust and efficient solution compared to traditional methods, especially under variable atmospheric conditions.
  • The technique has direct applications in mitigating noise from sources like outdoor concerts.