Using the well-known Curie's equation, ENP can be represented as a surface integral of an acoustic intensity distribution, referred to as Exterior Noise Power Distribution (ENPD) which can be estimated from surface pressure fluctuation and mean convective velocity in the vicinity of the vehicle surface.
Since the propagation of acoustic waves in the far-field can be regarded as locally planar, the acoustic intensity at the far-field observation point can be written in the next equation.
It was noted that a direct correlation existed between the degree of variation in the acoustic intensity
and the ascending changes in pitch.
is approximated objective function; X is penalty function of the designed variable; R, B, L and G are penalty functions of state variables, in front, back, left and right planes directions, respectively; [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] are state variables, acoustic intensity
in the front, back, left and right plane directions, respectively (Fig.
Some topics here include the effect of acoustic intensity
in plate polymeric membrane, the effect of ultrasonic intensity on the degradation of phenol solution, and ethanol extraction of flavonoids from mungbean skin.
In the design and implementation of the perception experiments, the results of which account for the bulk of PCOSD, she has exploited recent innovations in speech analysis software which allow sophisticated multi-parametric manipulation of sound signals by selective editing and resynthesis, besides equipping the researcher with a formidable battery of spectrographic analysis tools (with which one can, if desired, make durational measurements to within millionths of a second, and almost instantaneously extract huge volumes of data about frequency properties and acoustic intensity
from digital files sampled thousands of times per second, just at the click of a mouse button).
Guitar 1, the traditional model, had the greatest acoustic intensity
of the three.
In order to evaluate the acoustic performance of a newly designed engine block under various operating conditions, prototypes of different designs can be built, and acoustic parameters, such as sound pressure level, acoustic intensity
, and radiated sound power, can be measured at various operating conditions.
To measure any acoustic pressure present, a wider spacing of the transducers is more useful (as in acoustic intensity