Measuring a portable audio device’s response to excessive sound levels
Paul Kendrick, Trevor J. Cox, Bruno Fazenda, IR Jackson · University of Salford Institutional Repository (University of Salford) · 2013
This is a report detailing how a series of measurements were carried out to quantify the non-linear performance of a series of portable audio recorders. The performance of a series of common devices is quantified including the; Cannon 550D, Edirol r44, Neumann U87ai via Focusrite 2i4, shure SM57 via Focusrite 2i4, Zoom H2, Zoom H4, Google Nexus 4, iphone and a sony camcorder (vx2000). Parameters relating to attack release and thresholds of any dynamics processing present are reported, and the devices are probed fort any non-linear behaviour such as clipping, if any non-linear behaviour is identified it is parameterised by extracting the gain curve which relates input level to output level. 2.