US 11,986,374 B2
Method and system for measuring in-ear effective sound exposure under an earplug or without an earplug and for determining a wearer induced disturbance
Fabien Bonnet, Montreal (CA); Jeremie Voix, Montreal (CA); Hugues Nelisse, Montreal (CA); and Marcos Nogarolli, Montreal (CA)
Assigned to ECOLE DE TECHNOLOGIE SUPERIEURE, Montreal (CA)
Appl. No. 17/053,853
Filed by Ecole de technologie superieure, Montreal (CA); and IRSST—INSTITUT DE RECHERCHE EN SANTE ET EN SECURITE DU TRAVAIL DU QUEBEC, Montreal (CA)
PCT Filed May 9, 2019, PCT No. PCT/CA2019/050625
§ 371(c)(1), (2) Date Nov. 9, 2020,
PCT Pub. No. WO2019/213773, PCT Pub. Date Nov. 14, 2019.
Claims priority of provisional application 62/669,177, filed on May 9, 2018.
Prior Publication US 2021/0236339 A1, Aug. 5, 2021
Int. Cl. A61F 11/08 (2006.01); A61B 5/00 (2006.01); A61B 5/12 (2006.01); H04R 29/00 (2006.01)
CPC A61F 11/08 (2013.01) [A61B 5/12 (2013.01); A61B 5/6817 (2013.01); A61B 5/7278 (2013.01); H04R 29/00 (2013.01); A61B 2503/20 (2013.01); A61B 2560/0223 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for estimating an effective in-ear sound pressure level of an ear canal for an individual, the method comprises:
capturing a baseline outer-ear sound pressure level outside the ear canal;
capturing a baseline in-ear sound pressure level at an intermediate position of the ear canal;
determining a correction factor by identifying a predetermined filter and a standing-wave minimum frequency according to a difference between the captured baseline in-ear sound pressure level and the captured baseline outer-ear sound pressure level, while the ear canal is unoccluded;
after determining the correction factor, capturing a first sound pressure level at the intermediate position of the ear canal; and
converting the captured first sound pressure level in an equivalent tympanic sound pressure level according to the determined correction factor.