Most of the audio content we listen to in our daily lives is produced in mixing rooms. One of the most important acoustic properties of a mixing room is the monitoring response: the transfer function from the loudspeakers to the listening position. While a monitoring response does not need to be a flat frequency response, it is important that there are no significant dips in their amplitude characteristics. However, the Schroeder frequency can reach 200–300 Hz in a small-to-medium-sized mixing room, and the room modes provide negative impact to the monitoring response in the low band. This often generates significant dips in the low frequency response, where important information for the sound production is contained. One of the most important subjects for the acoustic design of a mixing room is how such significant dips can be prevented. The sound absorption plays an important role in this. Especially a resonant absorber, commonly used for low frequency absorption, can sometimes be an effective solution for managing the room modes when we can properly use its acoustic function of generating an antiphase reflection. This presentation introduces sound absorption design for a mixing room from two perspectives: reverberation control and monitoring response design. Some practical examples will also be shown.
Masataka Nakahara (Wed,) studied this question.