Recovery of Low Frequency response by

Impulse Editing...

Impulse Editing...

What follows is a preliminary outline of an approach for recovering low frequency system

response form in-room measurement of the system's impulse response, and appropriate

editing of the impulse based on known system parameters. The study is not complete but

represents the first steps in the development of the procedure.

response form in-room measurement of the system's impulse response, and appropriate

editing of the impulse based on known system parameters. The study is not complete but

represents the first steps in the development of the procedure.

extend to 3 or 4 msec. This corresponds to a low frequency limit of 250 to 333 Hz for the

reflection free impulse. Thus, it is anticipated that the long time approximation to the true impulse,

as given by Eq (15b) would be appended to the true impulse some what before 3 or 4 msec. As

an example, using 2.5 msec the "join point" would be at 400 Hz where there is clearly good

agreement between the true impulse and the long time approximation.

Note: The symbol * is used to

denote convolution, not to be

confused with simple

multiplication.

denote convolution, not to be

confused with simple

multiplication.