How does a loudspeaker interact with a room?

The sequence of echoes is studied in this video: reflexions, sound energy or reverberation time explanations are given here

How does the number of loudspeakers influence speech intelligibility?

This video presents the different consequences of a certain loudspeakers' position in a room over the sound quality et its energy.

Dealing with loudspeaker-to-microphone feedback

Active Audio explains you how to control the feedback when a microphone is amplified on a loudspeaker: gain's set up, number of microphones and loudspeakers and more...

How does one characterize speech intelligibility?

There are several methods to characterize the speech intelligibility. One of them is the STI measurement. This video will allow you to understand how this index works.

Is everything about speech intelligibility?

The subject of acoustic comfort is addressed here. It is a multidimensional issue which is not really taken into account by the STI.

Why controlling and how to control loudspeaker directivity ?

This video recalls the interest of accurate control of loudspeaker directivity regarding speech intelligibility ; presents the various methods of control of loudspeaker directivity ; then introduces the different types of loudspeaker arrays.

What does "100V lines" mean ?

The subject of impedance and losses in loudspeaker cables is discussed. We understand why raising the impedance of the loudspeakers can minimize losses, even in very long cables.

Characteristics of the human speech signal

We address the variability of voices in terms of crest factor, spectrum and phonemic flow rate. Sound examples illustrate the effect of different voices on speech intelligibility.