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

Design Example01:23

Design Example

350
The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
350
Sound Waves: Resonance01:14

Sound Waves: Resonance

2.6K
Resonance is produced depending on the boundary conditions imposed on a wave. Resonance can be produced in a string under tension with symmetrical boundary conditions (i.e., has a node at each end). A node is defined as a fixed point where the string does not move. The symmetrical boundary conditions result in some frequencies resonating and producing standing waves, while other frequencies interfere destructively. Sound waves can resonate in a hollow tube, and the frequencies of the sound...
2.6K
Passive Filters01:27

Passive Filters

570
Passive filters are utilized to shape the frequency spectrum of signals across a diverse array of applications. These filters, using only passive elements like resistors (R), inductors (L), and capacitors (C), are capable of selectively allowing or blocking certain frequency ranges without the need for external power sources.
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...
570
Perceiving Loudness, Pitch, and Location01:21

Perceiving Loudness, Pitch, and Location

293
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...
293
Magnetic Damping01:17

Magnetic Damping

514
Eddy currents can produce significant drag on motion, called magnetic damping. For instance, when a metallic pendulum bob swings between the poles of a strong magnet, significant drag acts on the bob as it enters and leaves the field, quickly damping the motion.
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
514
Sound Waves: Interference00:53

Sound Waves: Interference

3.8K
Sound waves can be modeled either as longitudinal waves, wherein the molecules of the medium oscillate around an equilibrium position, or as pressure waves. When two identical waves from the same source superimpose on each other, the combination of two crests or two troughs results in amplitude reinforcement known as constructive interference. If two identical waves, that are initially in phase, become out of phase because of different path lengths, the combination of crests with troughs...
3.8K

You might also read

Related Articles

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

Sort by
Same author

Study on the Cytotoxic Effects, Apoptosis Induction, Treatment Resistance, and Inflammation Caused by a Gold(III) Complex Containing 3,4-diaminobenzophenone and 2,3-butanedione Monoxime on the Esophageal Cancer Cell Line KYSE-30.

Current molecular medicine·2026
Same author

Adaptive Cavity-Enabled Crystalline Chirality in Nanocarbon Cages.

Angewandte Chemie (International ed. in English)·2026
Same author

Three-Year Visual Quality Evaluation in Children Using Orthokeratology Lenses: A Retrospective Study With OPD-Scan III Measurements.

Journal of ophthalmology·2026
Same author

Double-Plane Midface Lifting: An Improved and Efficient Approach Through the Lower Blepharoplasty Incision.

The Journal of craniofacial surgery·2026
Same author

Synthesis and guest inclusion for molecular catcher-based structure determination.

Nature protocols·2026
Same author

Dietary calcium and phosphorus levels in lactating Shenxian sows regulate growth performance and bone metabolism in suckling piglets.

Frontiers in veterinary science·2026

Related Experiment Video

Updated: Aug 8, 2025

Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations
06:51

Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations

Published on: August 21, 2018

7.1K

Low-frequency duct noise control using coupled loudspeakers.

Shang Li1, Zhenfei Zang1, Shiqi Zhang1

  • 1College of Power and Energy Engineering, Harbin Engineering University, 145 Nantong Street, Nangang District Harbin, Heilongjiang 150001, People's Republic of China.

The Journal of the Acoustical Society of America
|March 1, 2023
PubMed
Summary
This summary is machine-generated.

A novel duct noise control device utilizes electro-mechanical coupling and a Herschel-Quincke (HQ) tube for effective low-frequency noise attenuation. This innovative silencer offers a compact and flexible solution for noise reduction in various applications.

More Related Videos

Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators
11:44

Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators

Published on: August 15, 2014

10.4K
Assembly and Characterization of an External Driver for the Generation of Sub-Kilohertz Oscillatory Flow in Microchannels
08:32

Assembly and Characterization of an External Driver for the Generation of Sub-Kilohertz Oscillatory Flow in Microchannels

Published on: January 28, 2022

2.4K

Related Experiment Videos

Last Updated: Aug 8, 2025

Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations
06:51

Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations

Published on: August 21, 2018

7.1K
Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators
11:44

Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators

Published on: August 15, 2014

10.4K
Assembly and Characterization of an External Driver for the Generation of Sub-Kilohertz Oscillatory Flow in Microchannels
08:32

Assembly and Characterization of an External Driver for the Generation of Sub-Kilohertz Oscillatory Flow in Microchannels

Published on: January 28, 2022

2.4K

Area of Science:

  • Acoustics
  • Mechanical Engineering
  • Signal Processing

Background:

  • Traditional reactive silencers struggle with low-frequency noise control.
  • Existing solutions often lack compactness and flexibility.

Purpose of the Study:

  • To introduce a novel duct noise control device based on a Herschel-Quincke (HQ) tube and electro-mechanical coupling.
  • To investigate the performance of this new silencer design for low-frequency noise attenuation.
  • To develop and validate a periodic silencer array for enhanced performance.

Main Methods:

  • Utilizing electro-mechanical coupling with a Herschel-Quincke (HQ) tube.
  • Employing the transfer matrix method for performance analysis.
  • Conducting three-dimensional finite element method (FEM) simulations.
  • Performing simplified experimental verification.

Main Results:

  • The proposed device achieves effective low-frequency noise attenuation.
  • A fast track for acoustic wave transmission via an electrical circuit enhances noise reduction.
  • Plane wave theory predictions align well with FEM simulations.
  • Experimental results validate the silencing effect and theoretical accuracy.

Conclusions:

  • The novel HQ tube-based silencer offers a compact and flexible approach to low-frequency noise control.
  • Electro-mechanical coupling provides an efficient mechanism for noise attenuation.
  • The developed periodic silencer array broadens bandwidth and increases noise attenuation magnitude.