DS DS/EN ISO 11904-1
DS DSEN SO 11904-1 2003-JAN-23 Acoustcs - Determnaton of sound mmsson from sound sources placed close to the ear - Part 1 Technque usng a mcrophone n a real ear MRE technque
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This standard specifies a basic framework measurement methods for sound immission from sound sources placed close to the ear. These measurements are carried out with miniature or probe microphones inserted in the ear canals of human subjects.