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

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

951
A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.
951
Sampling Continuous Time Signal01:11

Sampling Continuous Time Signal

398
In signal processing, a continuous-time signal can be sampled using an impulse-train sampling technique, followed by the zero-order hold method. Impulse-train sampling involves the use of a periodic impulse train, which consists of a series of delta functions spaced at regular intervals determined by the sampling period. When a continuous-time signal is multiplied by this impulse train, it generates impulses with amplitudes corresponding to the signal's values at the sampling points.
In the...
398
Standing Electromagnetic Waves01:15

Standing Electromagnetic Waves

1.8K
Electromagnetic waves can be reflected; the surface of a conductor or a dielectric can act as a reflector. As electric and magnetic fields obey the superposition principle, so do electromagnetic waves. The superposition of an incident wave and a reflected electromagnetic wave produces a standing wave analogous to the standing waves created on a stretched string.
Suppose a sheet of a perfect conductor is placed in the yz-plane, and a linearly polarized electromagnetic wave traveling in the...
1.8K

You might also read

Related Articles

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

Sort by
Same author

Timing of tongue body movements in V1-C-V2 sequences with respect to segment boundaries in German.

The Journal of the Acoustical Society of America·2026
Same author

Investigation of singing with and without vibrato, using high-speed videolaryngoscopy and electroglottography.

The Journal of the Acoustical Society of America·2025
Same author

Refinement of OnePot PURE and Crude Ribosome Production for Reproducible Cell-free Protein Synthesis.

Journal of visualized experiments : JoVE·2025
Same author

Important Modulation Frequency Components of Temporal Amplitude Envelope Contributing to Vocal Emotion Perception.

Journal of speech, language, and hearing research : JSLHR·2025
Same author

Improving transfer function measurements for three-dimensionally printed waveguides using a sand layer.

JASA express letters·2025
Same author

Processing of prosodic cues of uncertainty in autistic and non-autistic adults: a study based on articulatory speech synthesis.

Frontiers in psychiatry·2024
Same journal

Peripheral B-cell receptor repertoire predicts immune-related adverse events following immune checkpoint inhibitor therapy in advanced renal cell carcinoma.

Scientific reports·2026
Same journal

Effects of black soldier fly (Hermetia illucens L.) larvae zoocompost on the mineral element content of blue honeysuckle berries.

Scientific reports·2026
Same journal

Investigation on absorption refrigeration performance of R1243zf with imidazolium ionic liquid as the working pairs.

Scientific reports·2026
Same journal

DeepTriage-CN: integrating clinical text with vital signs for emergency department admission prediction in an aging population.

Scientific reports·2026
Same journal

Gold nanoparticles as dual-action antiviral agents: disruption of SARS-CoV-2 viral envelopes and RNA integrity.

Scientific reports·2026
Same journal

Comparison of capillary microsampling and venous blood for multi-pathogen serosurveillance.

Scientific reports·2026
See all related articles

Related Experiment Video

Updated: Sep 30, 2025

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
06:25

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

Published on: February 12, 2014

8.6K

Silent speech command word recognition using stepped frequency continuous wave radar.

Christoph Wagner1, Petr Schaffer2, Pouriya Amini Digehsara3

  • 1Institute of Acoustics and Speech Communication, Chair for Speech Technology and Cognitive Systems, Technische Universität Dresden, 01069, Dresden, Germany. christoph.wagner@tu-dresden.de.

Scientific Reports
|March 11, 2022
PubMed
Summary
This summary is machine-generated.

Researchers developed a non-invasive radar system to decode silent speech. This technology achieved high accuracy in recognizing spoken words, offering new hope for communication restoration.

More Related Videos

Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements
09:36

Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements

Published on: June 25, 2021

3.2K
High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis
07:55

High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis

Published on: September 22, 2017

10.3K

Related Experiment Videos

Last Updated: Sep 30, 2025

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
06:25

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

Published on: February 12, 2014

8.6K
Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements
09:36

Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements

Published on: June 25, 2021

3.2K
High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis
07:55

High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis

Published on: September 22, 2017

10.3K

Area of Science:

  • Biomedical Engineering
  • Signal Processing
  • Human-Computer Interaction

Background:

  • Silent speech recovery is crucial for individuals with speech loss.
  • Radar offers a non-invasive approach to sensing speech, yet remains underexplored.
  • Existing methods often require invasive sensors or are limited in real-world application.

Purpose of the Study:

  • To investigate the efficacy of custom stepped frequency continuous wave (SFCW) radar for silent speech recognition.
  • To evaluate the performance of radar-based silent speech detection across different sessions and speakers.
  • To establish radar as a viable modality for non-invasive silent speech interfaces.

Main Methods:

  • Developed custom SFCW radar hardware with three antennas (cheeks, chin) and a 100 Hz update rate.
  • Recorded a corpus of 50 German words (40 command words, 10 digits) from two speakers.
  • Utilized a bidirectional long-short term memory (BiLSTM) network for speech recognition analysis.

Main Results:

  • Achieved 99.17% speaker-dependent multi-session recognition accuracy.
  • Obtained 88.87% speaker-dependent inter-session recognition accuracy.
  • Demonstrated that radar transmission spectra effectively discriminate between words, even across sessions.

Conclusions:

  • Radar is a highly effective non-invasive modality for silent speech recognition.
  • The developed system shows significant potential for restoring oral communication.
  • Further research can advance non-invasive silent speech interfaces using radar technology.