Anechoic Acoustic Measurements in a Reverberant Environment

The FX100 Audio Analyzer supports anechoic acoustic measurements under reverberant conditions. This feature delivers free-field frequency response results, even in suboptimal acoustical environments. The test is performed with a logarithmic GlideSweep.

Editable Time Window Masks out Unwanted Reflections

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)


Measured Impulse Response


Manually removing reflections from the walls and ceiling


Resulting actual Frequency Response of the Speaker (without any room reflections)


Learn more about the FX100 Audio Analyzer