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

Passive Filters01:27

Passive Filters

1.3K
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...
1.3K
Active Filters01:25

Active Filters

1.6K
Active filters are electronic circuits that use operational amplifiers (op-amps), resistors, and capacitors to filter out unwanted frequency components from a signal. A first-order low-pass active filter is designed to pass signals with a frequency lower than a certain cutoff frequency and attenuate frequencies higher than that cutoff frequency. The transfer function for a first-order low-pass active filter is:
1.6K
Op Amp AC Circuits01:18

Op Amp AC Circuits

641
Within an audio system, the filter circuit plays a pivotal role in processing the amplified audio signal from an amplifier. Its primary function is significantly attenuating signal components with lower frequencies, thereby shaping the audio output. This circuit's operations are examined, focusing on the fundamental filter configuration. This configuration involves an operational amplifier arranged in an inverting setup coupled with resistors (R1 and R2) and a capacitor (C1).
641
Design Example01:23

Design Example

649
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...
649
Second-order Op Amp Circuits01:19

Second-order Op Amp Circuits

731
Implementing second-order low-pass filters in audio systems is crucial in refining audio signals by eliminating undesirable high-frequency noise. These filters typically involve second-order op-amp circuits configured as voltage followers, encompassing two nodes with distinct storage elements.
The analysis of such circuits follows a systematic approach, similar to the second-order RLC circuits. In practical scenarios, bulky inductors are rarely employed due to their size and weight. This means...
731
Filtration00:53

Filtration

6.0K
Filtration is a physical separation process that involves passing a suspension through a porous medium to separate solids from fluids. During filtration, solids collect on the porous medium while liquids, also collectively known as the filtrate, pass through. The filtration medium is selected based on the filtration purpose, quantity, and nature of the precipitate. The general criteria for a suitable filtering medium are that it is inert, mechanically strong, nonabsorbent toward dissolved...
6.0K

You might also read

Related Articles

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

Sort by
Same author

Wavelet Spectrum in a Multi-Channel Network May Reduce Biopsy Rates on Diagnosis of Breast Tumors with BI-RADS Category 4a or Higher.

Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine·2026
Same author

Coupled ferroelectricity and phonon chirality.

Nature communications·2026
Same author

Enhanced tissue harmonic ultrasound with a stack-layer dual-frequency transducer.

Physics in medicine and biology·2026
Same author

Recent advances in transducers for through-tissue ultrasonic power transfer.

Progress in biomedical engineering (Bristol, England)·2026
Same author

In situ imaging of domain walls in ferroelectric single crystals by instant polarized light microscopy.

The Review of scientific instruments·2026
Same author

Biopsy Needle Integrated with Rotational Oblique Spectral Ultrasound (ROSUS) Imaging.

Sensors (Basel, Switzerland)·2026

Related Experiment Video

Updated: Apr 15, 2026

Synthetic, Multi-Layer, Self-Oscillating Vocal Fold Model Fabrication
10:16

Synthetic, Multi-Layer, Self-Oscillating Vocal Fold Model Fabrication

Published on: December 2, 2011

14.6K

An acoustic filter based on layered structure.

Jianguo Ma, Michael B Steer1, Xiaoning Jiang2

  • 1Department of Electrical and Computer Engineering, North Carolina State University , Raleigh, North Carolina 27695, USA.

Applied Physics Letters
|April 2, 2015
PubMed
Summary

Acoustic filters selectively block high frequencies and amplify low frequencies. This acoustic filter design enhances imaging resolution by reducing echoes and improving signal transmission.

More Related Videos

A Microfluidic Platform for Precision Small-volume Sample Processing and Its Use to Size Separate Biological Particles with an Acoustic Microdevice
11:32

A Microfluidic Platform for Precision Small-volume Sample Processing and Its Use to Size Separate Biological Particles with an Acoustic Microdevice

Published on: November 23, 2015

14.5K
X-ray Beam Induced Current Measurements for Multi-Modal X-ray Microscopy of Solar Cells
10:16

X-ray Beam Induced Current Measurements for Multi-Modal X-ray Microscopy of Solar Cells

Published on: August 20, 2019

14.6K

Related Experiment Videos

Last Updated: Apr 15, 2026

Synthetic, Multi-Layer, Self-Oscillating Vocal Fold Model Fabrication
10:16

Synthetic, Multi-Layer, Self-Oscillating Vocal Fold Model Fabrication

Published on: December 2, 2011

14.6K
A Microfluidic Platform for Precision Small-volume Sample Processing and Its Use to Size Separate Biological Particles with an Acoustic Microdevice
11:32

A Microfluidic Platform for Precision Small-volume Sample Processing and Its Use to Size Separate Biological Particles with an Acoustic Microdevice

Published on: November 23, 2015

14.5K
X-ray Beam Induced Current Measurements for Multi-Modal X-ray Microscopy of Solar Cells
10:16

X-ray Beam Induced Current Measurements for Multi-Modal X-ray Microscopy of Solar Cells

Published on: August 20, 2019

14.6K

Area of Science:

  • Acoustics and Wave Propagation
  • Signal Processing
  • Materials Science

Background:

  • Acoustic filters (AFs) are crucial for managing wave behavior in systems operating at multiple frequencies.
  • Controlling wave propagation is essential for optimizing performance in various multi-frequency applications.

Purpose of the Study:

  • To design and validate an acoustic filter capable of selective frequency manipulation.
  • To achieve both high-frequency signal suppression and low-frequency signal amplification using a single passive device.

Main Methods:

  • Development of a novel acoustic filter design targeting specific frequency responses.
  • Fabrication and experimental testing of prototype acoustic filters.
  • Comparative analysis of measurement results against design predictions.

Main Results:

  • The acoustic filter demonstrated a stop band for high frequencies and passive amplification for low frequencies.
  • High-frequency aliasing echoes were suppressed by 14.5 dB.
  • Low-frequency transmission was amplified by 8.0 dB, significantly improving imaging axial resolution from 416 to 86 μm.

Conclusions:

  • The proposed acoustic filter design effectively controls wave propagation in multi-frequency systems.
  • The demonstrated performance validates the design approach for applications requiring selective frequency filtering and amplification.
  • This technology offers a pathway to enhanced resolution in acoustic imaging and other multi-frequency systems.