Acoustic Power


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acoustic power

[ə′küs·tik ′pau̇·ər]
(acoustics)

Power, Acoustic

 

the energy carried by a sound wave through a particular surface per unit time; it is measured in watts. A distinction is made between the instantaneous value of acoustic power and the average over the period of an oscillation or a prolonged time interval. Of greatest interest is the average acoustic power per unit area, which is called the sound intensity.

References in periodicals archive ?
In these models, the influence of the helicoid is caused by centrifugal effects of the vortex that results in pressure drops and acoustic power dissipation giving rise to a dipole sound field.
Where k (M) proportionality constant of convection effect, pj is the steam jet density (kg/[m.sup.3]), [u.sub.j] is the discharge velocity (m/s), D is the diameter of the outlet cross section (m), p0 is the density of the surrounding medium (kg/m3), c0 is the velocity of sound in the surrounding medium (m/s), m is the experimental constant, n is the experimental constant.The final expression for calculating the total level of acoustic power generated by a steam discharge from a power generating boilers is,
The exterior noise power (ENP) around the vehicle is defined as the acoustic power radiated to the far-field and then can be calculated as an integration of the far-field acoustic intensity over a closed surface which encloses the vehicle at large distance from vehicle.
Now, normalizing the incident acoustic power to unity-that is, setting a*a = 1, then the reflected acoustic power is given by the value of the first part of Eq.
here I is sound pressure intensity, W/[m.sup.2]; W is acoustic power, W; S is surface area through which during particular time acoustic power permeates, [m.sup.2]; p is sound pressure in specific point; [rho] is air density, kg/[m.sup.3]; c is the speed of sound wave, m/s.
The brainchild of musician Edmundo Jones, he hopes it will give a platform to those who consider their music as 'acoustic power pop'.
In this paper, a similar formulation is used but using acoustic power propagating along a duct as the state variables rather than the acoustic pressure, see Figure 2.
The radiated acoustic power, which is the integration of the active intensity over the surface of plate, is defined by
The acoustic power associated with each bottom detection also was converted to acoustic backscatter intensity and used to derive an estimate of the scintillation index, SI, which is defined here as
Acoustic power of 10 mW, 100% duty cycle and 1 s exposure time were chosen for sonication treatment.
With the radiators placed in an opposing fashion vibration is eliminated, turning the energy into acoustic power.

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