Geoff
When the concert hall is full and there are not enough hangars in the cloak room and the audience takes their wraps to their seats with them this passive device now on their laps changes the time and energy response within the hall. These additional passive devices were added to the acoustic volume of the hall and are not part of the collective displacement of the hall patrons as intended by the acoustic designer. They are passive and displace air with various forms of reactive mass. Tom
When the concert hall is full and there are not enough hangars in the cloak room and the audience takes their wraps to their seats with them this passive device now on their laps changes the time and energy response within the hall. These additional passive devices were added to the acoustic volume of the hall and are not part of the collective displacement of the hall patrons as intended by the acoustic designer. They are passive and displace air with various forms of reactive mass. Tom