| Publication CODE |
Title |
| CLC/TS 61949:2008 |
ULTRASONICS - FIELD CHARACTERIZATION - in SITU EXPOSURE ESTIMATION in FINITE-AMPLITUDE ULTRASONIC BEAMS |
| |
| Price Excl. VAT |
Total number of pages, tables and drawings |
|
10.00 €
|
3 P. |
Description
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.
|
| Class |
C90
(TELECOMMUNICATIONS - ELECTRONIC GENERAL)
|
| Status |
TECHNICAL SPECIFICATION |
| Situation |
Currently active
|
|
| Registration |
95458 |
| ICS-Code (International Standards Classification) |
17.140.50
|
| NBN Status |
New |
|
| Date of ratification (d.o.r.) |
2008-05-01 |
| Date of availability (d.a.v.) |
2008-07-18 |
| Date of announcement (d.o.a.) |
2008-08-01 |
|
