Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Scaling

Scaling

In designing and analyzing filters, resonant circuits, or circuit analysis at large, working with standard element values like 1 ohm, 1 henry, or 1 farad can be convenient before scaling these values to more realistic figures. This approach is widely utilized by not employing realistic element values in numerous examples and problems; it simplifies mastering circuit analysis through convenient component values. The complexity of calculations is thereby reduced, with the understanding that...

Properties of Fourier Transform II

Properties of Fourier Transform II

The Fourier Transform (FT) is an essential mathematical tool in signal processing, transforming a time-domain signal into its frequency-domain representation. This transformation elucidates the relationship between time and frequency domains through several properties, each revealing unique aspects of signal behavior.
The Frequency Shifting property of Fourier Transforms highlights that a shift in the frequency domain corresponds to a phase shift in the time domain. Mathematically, if x(t) has...

Perception of Sound Waves

Perception of Sound Waves

The human ear is not equally sensitive to all frequencies in the audible range. It may perceive sound waves with the same pressure but different frequencies as having different loudness. Moreover, the perception of sound waves depends on the health of an individual's ears, which decays with age. The health of one's ears may also be affected by regular exposure to loud noises.
The pitch of a sound depends on the frequency and the pressure amplitude of the source. Two sounds of the same frequency...

Gain

Gain

Gain and phase shift are properties of linear circuits that describe the effect a circuit has on a sinusoidal input voltage or current. The circuit's behavior that contains reactive elements will depend on the frequency of the input sinusoid. As a result, it is observed that the gain and phase shift will all be frequency functions.
Gain:
Suppose Vin is the input and Vout is the output signal to a circuit.

Transformations of Functions I

Transformations of Functions I

A function's graph can be modified by changing its position or size without altering its overall shape. These transformations allow the graph to be moved across the coordinate plane while preserving its pattern and structure. One of the most common transformations is shifting, which repositions the graph without distorting it.When the output of a function is adjusted by adding or subtracting a constant, the graph shifts vertically. A positive value moves the graph upward, while a negative value...

Doppler Effect - II

Doppler Effect - II

The Doppler effect has several practical, real-world applications. For instance, meteorologists use Doppler radars to interpret weather events based on the Doppler effect. Typically, a transmitter emits radio waves at a specific frequency toward the sky from a weather station. The radio waves bounce off the clouds and precipitation and travel back to the weather station. The radio frequency of the waves reflected back to the station appears to decrease if the clouds or precipitation are moving...

You might also read

Related Articles

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

Sort by

Same author

Is pitch a smooth function of frequency? Evidence from octave adjustments.

The Journal of the Acoustical Society of America·2026

Same author

Simple frequency ratios naturally make precisely perceived melodies.

Current biology : CB·2025

Same author

Controlling audibility with noise for online experiments using sound.

JASA express letters·2023

Same author

The perception of octave pitch affinity and harmonic fusion have a common origin.

Hearing research·2021

Same author

Auditory Perception: Relative Universals for Musical Pitch.

Current biology : CB·2019

Same author

Effect of stimulus type and pitch salience on pitch-sequence processing.

The Journal of the Acoustical Society of America·2018

Search research articles

Related Experiment Video

Updated: May 31, 2026

A Lightweight, Headphones-based System for Manipulating Auditory Feedback in Songbirds

A Lightweight, Headphones-based System for Manipulating Auditory Feedback in Songbirds

Published on: November 26, 2012

Enhancing a tone by shifting its frequency or intensity.

Mayalen Erviti¹, Catherine Semal, Laurent Demany

¹Institut de Neurosciences Cognitives et Intégratives d'Aquitaine (UMR CNRS 5287), BP 63, Université de Bordeaux, 146 rue Leo Saignat, F-33076 Bordeaux, France.

The Journal of the Acoustical Society of America

|June 21, 2011

Summary

Auditory enhancement makes softer tones stand out. This study found enhancement occurs with intensity or frequency changes, suggesting distinct underlying auditory mechanisms for each.

More Related Videos

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Published on: February 4, 2018

Related Experiment Videos

Last Updated: May 31, 2026

A Lightweight, Headphones-based System for Manipulating Auditory Feedback in Songbirds

A Lightweight, Headphones-based System for Manipulating Auditory Feedback in Songbirds

Published on: November 26, 2012

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Published on: February 4, 2018

Area of Science:

Auditory Neuroscience
Psychoacoustics
Perceptual Psychology

Background:

Auditory enhancement is a phenomenon where a previously softer tone becomes perceptually prominent.
This effect is typically studied using pure tones with varying intensities.

Purpose of the Study:

To investigate auditory enhancement using complex inharmonic sounds.
To determine if frequency shifts, in addition to intensity changes, can elicit enhancement.
To explore the influence of noise bursts and ear presentation on enhancement.

Main Methods:

Complex inharmonic sounds composed of five pure tones were used.
Enhancement was tested with both intensity reductions and frequency shifts in precursor sounds.
The effect of a pink noise burst during a 500-ms delay was examined.
Binaural (same ear) versus dichotic (opposite ears) presentation was compared.

Main Results:

Auditory enhancement was observed for both intensity changes and frequency shifts.
Inserting pink noise during the delay had minimal impact on enhancement.
Enhancement from intensity changes was reduced with dichotic presentation.
Enhancement from frequency shifts was less affected by dichotic presentation.

Conclusions:

Auditory enhancement mechanisms differ for intensity changes and frequency shifts.
Frequency-shift-based enhancement may involve specialized neural detectors, such as automatic frequency-shift detectors.