The meaning of SOUND INTENSITY is the intensity of a sound in a specified direction measured by the average rate at which sound energy passes through a unit area normal to that direction and commonly expressed in ergs per second per square centimeter.
When an object vibrates it can produce pressure, which is proportional to amplitude. A vibrating object can also produce work. Work is measured in units of power or energy. Sound intensity is the measure of sound magnitude in units of power or energy. Thus, sound magnitude can be expressed...
it is convenient to express sound intensity on alogarithmic scale. On this scale, the sound intensity is measured relative to a reference level of10-16W/cm2(which is approximately the lowest audible sound intensity). The logarithmic intensity is measured in units ofdecibel(dB) and is defined ...
location of the sound source is perpendicular to the probe when the measuredsound intensityisminimum, as illustrated below. bksv.com bksv.com 当定位声源时,该灵敏度特性非常有用,因为当测量的声强最小时,声源位置与探头垂直,如下图所示。 bksv.cn ...
Sound intensity, amount of energy flowing per unit time through a unit area that is perpendicular to the direction in which the sound waves are travelling. Sound intensity may be measured in units of energy or work—e.g., microjoules (10-6 joule) per sec
objectively measured sound pressure (voltage), and theoretically calculated sound intensity (acoustic power) Psychoacoustic: Relationship between phon and sone Sound level change and the ratio (gain) Be precise: Double the sound pressure and double the sound power, or double the acoustic intensity To...
Intensity is defined to be the power per unit area carried by a wave. Power is the rate at which energy is transferred by the wave. In equation form, intensity I is I=PAI=PA, where P is the power through an area A. The SI unit for I is W/m2. The intensity of a sound wave ...
field intensity,field strength- the vector sum of all the forces exerted by an electrical or magnetic field (on a unit mass or unit charge or unit magnetic pole) at a given point in the field candlepower,light intensity- luminous intensity measured in candelas ...
intensityIr; the second fluid, from which the sound is reflected, contains the transmitted wave of intensityIt. The directions of the incident, reflected, and transmitted plane sound waves may be specified by the grazing angles Θi, Θr, and Θt(measured between the respective directions of ...
Acoustic intensity is defined as the average rate of energy transmission per unit area perpendicular to the direction of propagation of the wave. Its relation with amplitude can be written aswhere ρ is the equilibrium density of the air (measured in kilograms per cubic metre) and S is the ...