The room reflections can be excluded from the measurement results by introducing a time-window to the signal processing. A comfortable wizard in the FX-Control PC-software allows localizing the reflections in an impulse-response or energy-time curve (ETC) display. The time-window can then be graphically placed in front of the reflections, thus feeding the measurement algorithm with the direct sound signal only. The influence of the time-window to the frequency response becomes visible in real time.
Application Example
Frequency Response of a Speaker (measured with reflections from walls and ceiling)
![](/portals/0/pic/news/Flexus-FX100-Frequency-Response-with-reflections.jpg)
Measured Impulse Response
![](/portals/0/pic/news/Flexus-FX100-Impulse-Response-with-reflections.jpg)
Manually removing reflections from the walls and ceiling
![](/portals/0/pic/news/Flexus-FX100-Impulse-Response-without-reflections.jpg)
Resulting actual Frequency Response of the Speaker (without any room reflections)
![](/portals/0/pic/news/Flexus-FX100-Frequency-Response-without-reflections.jpg)
Learn more about the FX100 Audio Analyzer