Possibility of ESPI visualization of sound pressure fields

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61384984%3A51110%2F10%3A%230000430" target="_blank" >RIV/61384984:51110/10:#0000430 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Possibility of ESPI visualization of sound pressure fields

Popis výsledku v původním jazyce

Electronic speckle pattern interferometers (ESPI) are prominent helping tools for non contact observations of movements of an object surface. Their functionality is based on speckles, which are products of the interference effect between both the laser beams scattered from separate unevenness of the object rough surface and the reference beam originated from the same laser source. This method is applicable on rough surfaces of solids. In the case of acoustic fields the air particles don?t give speckle patterns. Also in this case ESPI visualization can be used, but based on a principle of changes in the air refractive index when air pressure is changed. The aim of this contribution is to explain basic know-how and possibilities of ESPI visualizations ofa sound pressure distribution in a defined space. The practical output is focused on applications on wind musical instruments (presented is an example of sound pressure distribution inside and outside of an organ pipe).

Název v anglickém jazyce

Possibility of ESPI visualization of sound pressure fields

Popis výsledku anglicky

Electronic speckle pattern interferometers (ESPI) are prominent helping tools for non contact observations of movements of an object surface. Their functionality is based on speckles, which are products of the interference effect between both the laser beams scattered from separate unevenness of the object rough surface and the reference beam originated from the same laser source. This method is applicable on rough surfaces of solids. In the case of acoustic fields the air particles don?t give speckle patterns. Also in this case ESPI visualization can be used, but based on a principle of changes in the air refractive index when air pressure is changed. The aim of this contribution is to explain basic know-how and possibilities of ESPI visualizations ofa sound pressure distribution in a defined space. The practical output is focused on applications on wind musical instruments (presented is an example of sound pressure distribution inside and outside of an organ pipe).

Druh

D - Stať ve sborníku

CEP obor

BI - Akustika a kmity

OECD FORD obor

—

Projekt

<a href="/cs/project/1M0531" target="_blank" >1M0531: Výzkumné centrum hudební akustiky</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2010

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of Second Vienna Talk on Music Acoustics

ISBN

978-3-900914-07-3

ISSN

—

e-ISSN

—

Počet stran výsledku

3

Strana od-do

—

Název nakladatele

Institute of Musical Acoustics (Wiener Klangstil)

Místo vydání

Vídeň, Rakousko

Místo konání akce

Vídeň, Rakousko

Datum konání akce

1. 1. 2010

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

—