Editing Impulse response (section)

===Loudspeakers===
Impulse response [[loudspeaker]] testing was first developed in the 1970s. Loudspeakers suffer from phase inaccuracy (delayed frequencies) which can be caused by passive [[Audio crossover|crossovers]], resonance, cone momentum, the internal volume, and vibrating enclosure panels.<ref>{{cite journal |title=Modeling and Delay-Equalizing Loudspeaker Responses |journal=Journal of the Audio Engineering Society |last1=Mäkivirta |first1=Aki |last2=Liski |first2=Juho |last3=Välimäki |first3=Vesa |volume=66 |issue=11 |year=2018 |pages=922–934 |doi=10.17743/jaes.2018.0053 |url=https://aes2.org/e-lib/download.cfm/pg922.pdf?ID=19869 }}</ref> The impulse response can be used to indicate when such inaccuracies can be improved by different materials, enclosures or crossovers.

Loudspeakers have a physical limit to their power output, thus the input amplitude must be limited to maintain linearity. This limitation led to the use of inputs like [[maximum length sequence]]s in obtaining the impulse response.<ref>{{cite web|url=https://books.google.com/books?id=q6w7AAAAMAAJ&q=%22impulse+response%22+%22loudspeaker+testing%22|title=Monitor|date=9 April 1976|access-date=9 April 2018|via=Google Books}}</ref>