File:Demo of Active Resonators on the Active Noise Control Fan (GRC-2018-CM-0135).webm

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Demo_of_Active_Resonators_on_the_Active_Noise_Control_Fan_(GRC-2018-CM-0135).webm ‎(WebM audio/video file, VP9/Opus, length 6 min 54 s, 654 × 484 pixels, 1.68 Mbps overall, file size: 82.99 MB)

Captions

Captions

NASA has been involved in several projects to reduce aircraft engine noise. In the 1990s Active Noise Control was investigated as a potential method to reduce aircraft engine noise.

Summary

[edit]
Description
English: NASA has been involved in several projects to reduce aircraft engine noise. In the 1990s Active Noise Control was investigated as a potential method to reduce aircraft engine noise. A description and demonstration of Active Resonators on the Active Noise Control Fan is shown in this video.
Date Taken on 1 October 1998
Source
This image or video was catalogued by Glenn Research Center of the United States National Aeronautics and Space Administration (NASA) under Photo ID: GRC-2018-CM-0135.

This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing.
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Author NASA Glenn Research Center
Keywords
InfoField
Duct Acoustics; Active Noise Control; Noise Reduction; Fan Noise

Licensing

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Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
Warnings:

File history

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Date/TimeThumbnailDimensionsUserComment
current14:37, 4 May 20246 min 54 s, 654 × 484 (82.99 MB)OptimusPrimeBot (talk | contribs)Imported media from http://images-assets.nasa.gov/video/GRC-2018-CM-0135/GRC-2018-CM-0135~orig.mp4

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Transcode status

Update transcode status
Format Bitrate Download Status Encode time
VP9 480P 816 kbps Completed 15:18, 4 May 2024 6 min 32 s
Streaming 480p (VP9) 714 kbps Completed 15:17, 4 May 2024 6 min 25 s
VP9 360P 365 kbps Completed 15:10, 4 May 2024 3 min 39 s
Streaming 360p (VP9) 261 kbps Completed 15:10, 4 May 2024 3 min 34 s
VP9 240P 193 kbps Completed 15:07, 4 May 2024 2 min 27 s
Streaming 240p (VP9) 89 kbps Completed 15:06, 4 May 2024 2 min 21 s
WebM 360P 553 kbps Completed 15:12, 4 May 2024 1 min 50 s
Streaming 144p (MJPEG) 975 kbps Completed 15:04, 4 May 2024 15 s
Stereo (Opus) 102 kbps Completed 15:16, 4 May 2024 8.0 s
Stereo (MP3) 128 kbps Completed 15:16, 4 May 2024 13 s

Metadata

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