The sound intensity probe SIS 194 3D 1/4′ allows a simultaneous sound intensity measurement at one point of a room in all three dimensions. For this purpose an arrangement of three one-dimensional sound intensity probes is formed, thus all three axes of the microphone pairs cross in one point and are in a plane perpendicular in each case. Each of those microphone pairs constitutes a one-dimensional sound intensity probe in conventional design. Due to its two-channel technology each individual Sound Intensity Probe makes it possible not only to measure sound pressure levels but also to record the sound pressure gradient which is needed to calculate the sound intensity. The SIS 194 3D 1/4′ consists of three Measuring Microphone Capsules Pairs MK 390 E (2x MK 301 E) with matched phase response and frequency response. Due to the use of the 1/4” Measuring Microphone Preamplifiers MV 310, sound field distortions (shadowing and diffractions) are minimal. The distance between the microphone pairs is defined by spacers (12 mm, 7 mm). These enable measurements in a frequency range between 1 kHz and 10 kHz. The quality of conformance between the microphone pairs with regard to their transforming functions is measured in compliance with IEC 1043 and documented as Minimum pressure-residual intensity index for probes. Each microphone capsule pair comes with a measuring protocol.
Технические характеристики
CharacteristicsMeasured valuesound intensityDomainmeasurementOther characteristicsIEC
