Sound intensity probe SIS 190 DOUBLE

New - Sound intensity probe SIS 190 double New - Measurement of sound intensity in a very wide frequency range The sound intensity probe SIS 190 double allows a simultaneous sound intensity measurement in a very large frequency range. For this purpose an arrangement of one one-dimensional 1/2" sound intensity probe and one one-dimensional 1/4" sound intensity probe is formed. 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 190 double consists of the Measuring Microphone Capsules Pairs MK 290 E (2x MK 222 E) and 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 (6 mm, 50 mm). These enable measurements in a frequency range between 35 Hz and 12 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.