This portion of IEC 60645 is intended for instruments predominantly used for measuring acoustic impedance or admittance within the human external acoustic meatus, utilizing a specified probe tone. It is acknowledged that alternative probe signals may also be employed. The standard delineates the characteristics that manufacturers must specify, establishes performance criteria for three different types of instruments, and dictates the features that these instruments must offer. This standard outlines testing methods for approval purposes and provides guidance on procedures for conducting regular calibrations.
The intent of this standard is to guarantee that measurements conducted under similar testing conditions with various instruments adhering to the standard will yield consistent results. It is not designed to inhibit the development or integration of new functionalities, nor to discourage innovative methods.
