Reverberation Time RT60
The XL2 Acoustic Analyzer measures the energy decay in the range from 63 Hz to 8 kHz by the Schroeder method in 1/1 octave bands. Automatic triggering and averaging of multiple measurements simplify the operation and minimizes the measurement time. Use either an impulse source or an interrupted Pink Noise as the test signal. The optional Extended Acoustic Pack extends the RT60 measurement to a 1/3 octave resolution. The measurement result may be compared with the recommended reference values using the optional software «Room Acoustics Reporter».
Speech Intelligibility STI
The XL2 Analyzer, with the STIPA Option installed, measures the Speech Intelligibility according to the latest revision (edition 4) of the IEC 60268-16:2011 standard and older editions. It offers ambient noise correction and automated averaging for repeated measurements. The XL2 displays the Speech Transmission Index (STI) and the Common Intelligibility Scale (CIS), accompanied by the individual levels and modulation indices of the seven Octave bands. This allows e.g. to determine the privacy and distraction distance in open plan offices in accordance with ISO 3382-3.
Sound Pressure Level
The XL2 is a powerful sound level meter for comprehensive room acoustic measurements. It offers a wide range of levels, such as average Leq, maximum or minimum sound pressure level measured in combination with frequency weighting A, C or Z and time weightings fast, slow and optional impulse. All results are simultaneously available.
Customers may log all acquired level information onto a removable SD card. Additionally, the XL2 offers wav-file recording for a complete documentation of the measured sound pressure levels. Voice notes may also be added to each measurement.
Background Noise Spectrum
The RTA perfectly suits the sound optimization in rooms. The XL2 measures and logs wideband values and the real time spectrum in 1/1 or 1/3 octave-band resolution according to IEC 61260 class 0. The sound level meter results of the wideband and RTA spectrum are simultaneously available.
The XL2 Acoustic Analyzer provides a Noise Curve measurement for an objective rating of the background noise level in a room. The Noise Curve rating of a spectrum is designated as the value of the highest noise curve “touched” by the measured octave-band spectrum. The Speech Interference Level (SIL) and the Noise Curve rating are calculated in parallel. The Noise Curve function is offered with the Spectral Limits Option.