SIST-TS CLC/TS 61949:2008

Oznaka standarda: SIST-TS CLC/TS 61949:2008
Koda projekta: 20770
Organizacija: SIST
Naslov (angleški): Ultrasonics - Field characterization - In situ exposure estimation in finite-amplitude ultrasonic beams
Naslov (slovenski): Ultrazvok - Določanje lastnosti polja - Ovrednotenje izpostavljenosti v ultrazvočnih žarkih, ki imajo amplitudo s končno velikostjo, na kraju samem (IEC/TS 61949:2007)
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SIST-TS CLC/TS 61949:2008 angleški jezik Active SIST-H: 78.65 EUR
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Tehnični odbor: I11 - Imaginarni 11
ICS: 17.140.50
Status: Objavljen
Objavljen: 01-Oct-2008
Refer. št. objave: Sporočila 2008-10
Referenčna oznaka: CLC/TS 61949:2008
Področje projekta (angleško): This Technical Specification establishes: the general concept of the limits of applicability of acoustic measurements in water resulting from finite-amplitude acoustic effects; - a method to ensure that measurements are made under quasi-linear conditions in order to minimise finite-amplitude effects, which may be applied under the following conditions: - to acoustic fields in the frequency range 0,5 MHz to 15 MHz; - to acoustic fields generated by plane sources and focusing sources of amplitude gain up to 12; - at all depths for which the maximum acoustic pressure in the plane perpendicular to the acoustic axis lies on the axis; - to both circular and rectangular source geometries; - to both continuous-wave and pulsed fields; - the definition of an acoustic quantity appropriate for establishing quasi-linear conditions; - a threshold value for the acoustic quantity as an upper limit for quasi-linear conditions; - a method for the estimation of attenuated acoustic quantities under conditions of nonlinear propagation in water.

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