4 ms·

> These are notoriously inaccurate. Actually, if you pick the correct app they are surprisingly accurate: http://scitation.aip.org/content/asa/journal/jasa/135

• deleted 12y ago
  [deleted]
• warble 12y ago
  From the referenced study: "The measurements were conducted in a diffuse sound field at a reverberant noise chamber at the NIOSH acoustic testing laboratory. The diffuse sound field ensured that the location and size of the smartphones did not influence the results of the study. " Having done sound testing extensively, you can be sure in an airplane positioning and sound source and sound type can drastically impact your measurements. Multiple reflections can re-enforce, or reduce the measured level. The type of sound measured is very important as well. He's not measuring pink noise on the airplane, what the measured level of a particular sound is, needs to be normalized to really understand what effects it will have on you. I'm sure in a good test setup the smartphone can get you pretty darned close. I'm more concerned with this guy's test setup than the equipment used.