NDLI: Schlieren imaging of loud sounds and weak shock waves in air near the limit of visibility

Content Provider	Springer Nature Link
Author	Madalis, Matthew J. Hargather, Michael John Settles, Gary S.
Copyright Year	2009
Abstract	A large schlieren system with exceptional sensitivity and a high-speed digital camera are used to visualize loud sounds and a variety of common phenomena that produce weak shock waves in the atmosphere. Frame rates varied from 10,000 to 30,000 frames/s with microsecond frame exposures. Sound waves become visible to this instrumentation at frequencies above 10 kHz and sound pressure levels in the 110 dB (6.3 Pa) range and above. The density gradient produced by a weak shock wave is examined and found to depend upon the profile and thickness of the shock as well as the density difference across it. Schlieren visualizations of weak shock waves from common phenomena include loud trumpet notes, various impact phenomena that compress a bubble of air, bursting a toy balloon, popping a champagne cork, snapping a wooden stick, and snapping a wet towel. The balloon burst, snapping a ruler on a table, and snapping the towel and a leather belt all produced readily visible shock-wave phenomena. In contrast, clapping the hands, snapping the stick, and the champagne cork all produced wave trains that were near the weak limit of visibility. Overall, with sensitive optics and a modern high-speed camera, many nonlinear acoustic phenomena in the air can be observed and studied.
Ending Page	17
Page Count	9
Starting Page	9
File Format	PDF
ISSN	09381287
e-ISSN	14322153
Journal	Shock Waves
Issue Number	1
Volume Number	20
Language	English
Publisher	Springer-Verlag
Publisher Date	2009-08-23
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Condensed Matter Physics Shock waves Thermodynamics Schlieren Fluid- and Aerodynamics Noise High-speed imaging Engineering Thermodynamics, Heat and Mass Transfer Nonlinear acoustics Engineering Fluid Dynamics Sound Acoustics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Mechanical Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Schlieren imaging of loud sounds and weak shock waves in air near the limit of visibility

Characterizing pyrotechnic igniter output with high-speed schlieren imaging

Growth and decay of weak shock waves in magnetogasdynamics

Application of digital phase-shift holographic interferometry to weak shock waves propagating at Mach 1.007

Curved shock theory

Visualization of compressible vortex rings using the background-oriented schlieren method

Shock and blast waves mitigation

Analysis of oblique shock waves in solids using shock polars

Background-oriented schlieren with natural background for quantitative visualization of open-air explosions

Schlieren imaging of loud sounds and weak shock waves in air near the limit of visibility

Similar Documents

Schlieren imaging of loud sounds and weak shock waves in air near the limit of visibility

Characterizing pyrotechnic igniter output with high-speed schlieren imaging

Growth and decay of weak shock waves in magnetogasdynamics

Application of digital phase-shift holographic interferometry to weak shock waves propagating at Mach 1.007

Curved shock theory

Visualization of compressible vortex rings using the background-oriented schlieren method

Shock and blast waves mitigation

Analysis of oblique shock waves in solids using shock polars

Background-oriented schlieren with natural background for quantitative visualization of open-air explosions

Schlieren imaging of loud sounds and weak shock waves in air near the limit of visibility