NF S31-001-5*NF EN 60645-5:2005 Electroacoustics - Audiometric equipment - Part 5 : instruments for the measurement of aural acoustic impedance/admittance
2005NF S31-001-5*NF EN 60645-5:2005 Electroacoustics - Audiometric equipment - Part 5 : instruments for the measurement of aural acoustic impedance/admittance