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

Calibration Curves: Linear Least Squares

Calibration Curves: Linear Least Squares

A calibration curve is a plot of the instrument's response against a series of known concentrations of a substance. This curve is used to set the instrument response levels, using the substance and its concentrations as standards. Alternatively, or additionally, an equation is fitted to the calibration curve plot and subsequently used to calculate the unknown concentrations of other samples reliably.
For data that follow a straight line, the standard method for fitting is the linear...

Calibration Curves: Correlation Coefficient

Calibration Curves: Correlation Coefficient

In a linear calibration curve, there is a value called the calibration coefficient, denoted by 'r,' which measures the strength and the direction of association between two variables. The correlation coefficient value ranges from −1 to +1. A value of +1 indicates a perfect positive linear correlation, −1 denotes a perfect negative correlation, and 0 implies no correlation between the two variables. A positive correlation value establishes that as one variable increases, the other increases, and...

Glassware Calibration

Glassware Calibration

Accurate calibration of glassware, such as volumetric flasks, pipettes, and burettes, is essential to ensure accurate measurements in the analytical laboratory. Calibration helps maintain consistency across measurements and prevents errors arising from inaccurate volumes.
Volumetric flasks: Volumetric flasks are designed to prepare aqueous solutions of precise volumes accurately with a calibration line on the neck. To calibrate a volumetric flask, it is important to fill it with distilled...

You might also read

Related Articles

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

Sort by

Same author

Linking deterministic and stochastic aspects of the seafloor's acoustic response in the context of seabed mapping with echosounders.

The Journal of the Acoustical Society of America·2025

Same author

Geometric calibration of very large microphone arrays in mismatched free field.

The Journal of the Acoustical Society of America·2019

Same author

Bone-conducted sound in a dolphin's mandible: Experimental investigation of elastic waves mediating information on sound source position.

The Journal of the Acoustical Society of America·2018

Same author

A robust and passive method for geometric calibration of large arrays.

The Journal of the Acoustical Society of America·2016

Search research articles

Related Experiment Video

Updated: May 27, 2026

An Automated System for Sound Localization Testing in Hearing-Impaired Listeners

An Automated System for Sound Localization Testing in Hearing-Impaired Listeners

Published on: March 13, 2026

A hybrid method for calibrating acoustic arrays.

Pierre Cervenka¹, Jacques Marchal

¹Centre National de la Recherche Scientifique (CNRS), UMR 7190, Institut Jean le Rond d’Alembert, Saint-Cyrl’Ecole, France. pierre.cervenka@upmc.fr

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

|November 16, 2011

Summary

A new hybrid method calibrates underwater acoustic arrays by analyzing signals within limited time windows. This technique offers improved signal-to-noise ratios for precise element characterization.

More Related Videos

Enhancing Electrode Location Assessment in Cochlear Implantation via Computed Tomography Image Fusion

Enhancing Electrode Location Assessment in Cochlear Implantation via Computed Tomography Image Fusion

Published on: January 17, 2025

Stereocilia Bundle Imaging with Nanoscale Resolution in Live Mammalian Auditory Hair Cells

Stereocilia Bundle Imaging with Nanoscale Resolution in Live Mammalian Auditory Hair Cells

Published on: January 21, 2021

Related Experiment Videos

Last Updated: May 27, 2026

An Automated System for Sound Localization Testing in Hearing-Impaired Listeners

An Automated System for Sound Localization Testing in Hearing-Impaired Listeners

Published on: March 13, 2026

Enhancing Electrode Location Assessment in Cochlear Implantation via Computed Tomography Image Fusion

Enhancing Electrode Location Assessment in Cochlear Implantation via Computed Tomography Image Fusion

Published on: January 17, 2025

Stereocilia Bundle Imaging with Nanoscale Resolution in Live Mammalian Auditory Hair Cells

Stereocilia Bundle Imaging with Nanoscale Resolution in Live Mammalian Auditory Hair Cells

Published on: January 21, 2021

Area of Science:

Acoustics
Signal Processing
Array Calibration

Background:

Underwater applications require precise calibration of large acoustic arrays.
Experimental setups often impose constraints on time windows for signal analysis.
Short wideband pulses limit signal-to-noise ratios, hindering accurate measurements.

Purpose of the Study:

To present a novel method for calibrating elements in large underwater acoustic arrays.
To measure element sensitivity and directivity across their full bandwidth.
To overcome limitations imposed by bounded experimental geometries and short time windows.

Main Methods:

A hybrid method using time-frequency-limited signals is proposed as an alternative to time-delay spectrometry (TDS).
The method employs coherent sums of received signals to track signal time-of-flight.
A fitting process delineates interference-free time windows based on calibration geometry.

Main Results:

The hybrid method achieves comparable spectral density to TDS during frequency scanning.
The filtering process in the hybrid method differs significantly from TDS.
Accurate delineation of interference-free time windows is enabled by the fitting process.

Conclusions:

The proposed hybrid method effectively calibrates underwater acoustic array elements.
It provides a viable alternative to classical TDS, especially under geometric constraints.
The technique enhances the precision of sensitivity and directivity measurements.