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NTi Audio News

16. Oct. 2013

XL2 Analyzer measures Noise Curves




The XL2 Analyzer offers with firmware V2.60 on-site measurement of all commonly used noise curves according to ANSI and ISO standards. The XL2 determines the acoustic noise spectrum of a room and displays the results together with the reference curves of the standard selected by the operator.

Noise curve standards are used to objectively rate the noise level and thus the acoustical quality of a room or environment. The XL2 Noise Curve measurements provide numerical and graphical measurement results for Noise Ratings (NR) in accordance with ISO 1996, Noise Criteria (NC) in accordance with ANSI 12.2-2008 and its legacy version of 1995, as well as Preferred Noise Criterion (PNC) and Room Noise Criterion (RNC) curves. The Speech Interference Level (SIL) and Room Criteria (RC) curve rating is also calculated in parallel.

Results of all Noise Criteria standards available at same time
The XL2 retains all relevant measurement values in its memory, allowing the user to switch between the different measurement standards after completion of the acquisition, without being forced to reacquire the measurement data. Measurement results can be stored on the internal SD card and later integrated into user reports. They contain the applicable noise curve data and the frequency band with the highest noise band value, as well as the averaged spectrum.

XL2 Analyzer improves efficiency
Philipp Schwizer, CEO of NTi Audio AG, comments: “The measurement and documentation of noise criteria is a frequent task for an acoustic consultant. In the past the calculations for some or all different curves had to be done off-line with a PC-based Excel tool. With the current implementation the user can obtain and document all relevant noise curve data for various international standards directly on the instrument, saving a lot of time and greatly increasing efficiency.”


The XL2 Noise Curve measurements are part of the Spectral Limits Option.

Download the latest XL2 firmware for free at the XL2 Support website.

Read more about the XL2 Acoustic Analyzer at www.nti-audio.com/XL2.

Press Picture(s) for download here.

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