intimacy

In architectural acoustics, "intimacy" refers to the listener's perception of being close to the performers. This feeling is achieved when the first reflected sound reaches the listener approximately 20 milliseconds after the direct sound. This can be accomplished in smaller spaces or in larger halls by using elements like orchestral shells that partially enclose the performers.1

Good acoustic design also considers other factors such as reverberation time, sound absorption, echoes, acoustic shadows, and the blend of sounds. The goal is to optimize the sound quality for the intended use of the space, whether it's for music performance or speech. For instance, music requiring clarity, like that of Bach or Mozart, benefits from shorter reverberation times, while Romantic era music may require longer reverberation times for a fuller sound.21