File:ExpoChirpToolbox- a Pd implementation of ESS impulse response measurement.pdf

ExpoChirpToolbox: a Pure Data implementation of ESS impulse response measurement Katja Vetter, Serafino di Rosario

Abstract Impulse response (IR) measurements for assessing acoustic properties of spaces have been done since long time, with various techniques and test signals. Of these, the Exponential Sine Sweep method, successfully advocated by Angelo Farina [2] in the last decade, has outstanding properties. This paper describes an open source Pure Data implementation of the ESS method. A dedicated Pd class [expochirp∼] is introduced, as the basis of a modular tool chain performing subsequent tasks in measurement and analysis proce- dures. The test signal is refined in several ways, respective to existing implementations. Mathematical aspects of ESS method and the ExpoChirp implementation are discussed in detail.

Keywords IR measurement, ESS method, room acoustics