软件还能模拟在房间内安装额外吸声体所带来的影响。用户可以将特定表面吸声材料或物体的吸声系数导入到软件中。软件会计算出预期的新混响时间以及房间内声级的变化。此外，它还会显示房间内的A/V 比和平均吸声系数。模拟是根据赛宾（Sabine）公式和 DIN EN 12354-6 标准进行的。对于吸声系数较高的房间，模拟也可以根据伊林（Eyring）公式进行。
As a research laboratory invested in supporting communities through real time noise monitoring, I am very happy to exclusively use NTi instruments. Not only are the robust, easy to use, and provide high quality data, the customer service is outstanding and their team will work with you to find the most cost effective and appropriate solutions needed for problems ranging from easy to difficult.
Erica D. Walker MSc, ScD, RGSS Assistant Professor of Epidemiology, Brown University School of Public Health
I’ve been using the XL2 for over 15 years for short-term and long-term measurements in all kinds of indoor and outdoor environments all across the country. The meter gets me what I want, when I need it. It’s not only the best value for acoustical measurements, it’s the best tool period. I bet my company and reputation on XL2 results and it has not let me down. You would be crazy not to consider adding NTi instruments to your toolkit.
Herb Singleton, P.E., INCE Bd. Cert., President, Cross-Spectrum Acoustics
We at Constructure GmbH use two XL3 sound level meters for noise monitoring during demolition work. We are very satisfied with these highly user-friendly instruments, the online monitoring in the MeasurEye Cloud, the good advice and qualified support. Factory calibrations at NTi Audio are also handled very smoothly and without complications.
