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

Hair Cells01:22

Hair Cells

36.1K
Hair cells are the sensory receptors of the auditory system—they transduce mechanical sound waves into electrical energy that the nervous system can understand. Hair cells are located in the organ of Corti within the cochlea of the inner ear, between the basilar and tectorial membranes. The actual sensory receptors are called inner hair cells. The outer hair cells serve other functions, such as sound amplification in the cochlea, and are not discussed in detail here.
36.1K
Ultrasonography01:17

Ultrasonography

6.5K
Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called...
6.5K
Imaging Studies II: Ultrasonography01:24

Imaging Studies II: Ultrasonography

907
IntroductionUltrasonography, or renal ultrasound, is a noninvasive medical imaging technique that uses high-frequency sound waves to visualize the kidneys, ureters, bladder, and surrounding tissues.Indications for Urinary System UltrasonographyUrinary system ultrasonography is indicated in various clinical scenarios, such as:Kidney Stones (Urolithiasis): To detect and monitor the size and presence of kidney or urinary tract stones.Hydronephrosis: To assess the dilation of the renal pelvis and...
907
Precipitation Gravimetry01:03

Precipitation Gravimetry

12.6K
Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
12.6K

You might also read

Related Articles

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

Sort by
Same author

Seeds accelerate germination at beneficial planting depths by sensing the sound of rain.

Scientific reports·2026
Same author

Nanoparticles co-loaded with bacillus Calmette-Guérin pure protein derivative and doxorubicin for bladder tumor therapy.

BMC biotechnology·2026
Same author

C21orf2 as a potential regulator of JAK2/STAT3 signaling in prostate cancer cell proliferation and apoptosis: an exploratory study.

BMC cancer·2026
Same author

Loss of biomechanical features reveals smooth muscle disruption and disease progression in prostate cancer.

Cancer cell international·2026
Same author

Sexual health distress and needs after radical prostatectomy: a scoping review.

Sexual medicine reviews·2026
Same author

Integration of genetic, proteomic, and transcriptomic data identifies therapeutic targets and prognostic biomarkers in bladder cancer.

Translational andrology and urology·2025

Related Experiment Video

Updated: Apr 28, 2026

Author Spotlight: A Stable Phantom Material for Optical and Acoustic Imaging
04:54

Author Spotlight: A Stable Phantom Material for Optical and Acoustic Imaging

Published on: June 16, 2023

4.0K

Using a coherent hydrophone array for observing sperm whale range, classification, and shallow-water dive profiles.

Duong D Tran1, Wei Huang1, Alexander C Bohn1

  • 1Department of Electrical and Computer Engineering, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115.

The Journal of the Acoustical Society of America
|June 9, 2014
PubMed
Summary

Researchers used a hydrophone array to track sperm whales off New England, estimating their location, range, and distinguishing multiple individuals. This method achieved over 60 km detection range, aiding sperm whale (Physeter macrocephalus) acoustic monitoring.

More Related Videos

Development of New Methods for Quantifying Fish Density Using Underwater Stereo-video Tools
09:32

Development of New Methods for Quantifying Fish Density Using Underwater Stereo-video Tools

Published on: November 20, 2017

8.8K
Reefshape: A System for the Efficient Collection and Automated Processing of Time-Series Underwater Photogrammetry Data for Benthic Habitat Monitoring
13:35

Reefshape: A System for the Efficient Collection and Automated Processing of Time-Series Underwater Photogrammetry Data for Benthic Habitat Monitoring

Published on: June 13, 2025

1.9K

Related Experiment Videos

Last Updated: Apr 28, 2026

Author Spotlight: A Stable Phantom Material for Optical and Acoustic Imaging
04:54

Author Spotlight: A Stable Phantom Material for Optical and Acoustic Imaging

Published on: June 16, 2023

4.0K
Development of New Methods for Quantifying Fish Density Using Underwater Stereo-video Tools
09:32

Development of New Methods for Quantifying Fish Density Using Underwater Stereo-video Tools

Published on: November 20, 2017

8.8K
Reefshape: A System for the Efficient Collection and Automated Processing of Time-Series Underwater Photogrammetry Data for Benthic Habitat Monitoring
13:35

Reefshape: A System for the Efficient Collection and Automated Processing of Time-Series Underwater Photogrammetry Data for Benthic Habitat Monitoring

Published on: June 13, 2025

1.9K

Area of Science:

  • Marine bioacoustics
  • Cetacean research
  • Oceanography

Background:

  • Sperm whale (Physeter macrocephalus) vocalizations are crucial for understanding their behavior and distribution.
  • Passive acoustic monitoring (PAM) offers a non-invasive method for studying marine mammals in their natural habitat.
  • Accurate localization and classification of sperm whale sounds are essential for effective ecological studies.

Purpose of the Study:

  • To develop and validate a passive acoustic localization and classification system for sperm whales.
  • To determine the detection range and capabilities of a towed horizontal hydrophone array system for sperm whale monitoring.
  • To estimate sperm whale dive profiles using acoustic data in specific New England marine environments.

Main Methods:

  • Utilized a single, low-frequency (<2500 Hz), densely sampled, towed horizontal coherent hydrophone array.
  • Employed time-domain beamforming for precise bearing estimation of sperm whale clicks.
  • Applied moving array triangulation and time difference of arrival (TDOA) for range and depth estimation.
  • Incorporated an ocean waveguide-acoustic propagation model to account for transmission loss.

Main Results:

  • Successfully localized and classified sperm whales with high signal-to-noise ratio using beamforming.
  • Distinguished multiple, concurrently vocalizing sperm whales based on spatial location and click intervals.
  • Estimated a sperm whale dive profile in the Gulf of Maine using TDOA of direct and reflected signals.
  • Achieved sperm whale detection ranges exceeding 60 km under favorable sea conditions after coherent array processing.

Conclusions:

  • The towed horizontal hydrophone array system is effective for passive localization and classification of sperm whales.
  • The developed acoustic methods significantly enhance the capability for long-range sperm whale detection and monitoring.
  • This technology provides valuable tools for sperm whale ecological research and conservation efforts in the New England region.