GSO ASTM F2504:2021
Gulf Standard
Current Edition
·
Approved on
01 July 2021
·
Standard Practice for Describing System Output of Implantable Middle Ear Hearing Device
GSO ASTM F2504:2021 Files
English
6 Pages
Current Edition
Reference Language
GSO ASTM F2504:2021 Scope
1.1 This practice defines means for describing system performance (ex vivo) and, in particular, system output of an
implantable middle ear hearing device (IMEHD) by measuring
a physical quantity that is relevant to the insertion gain and
output level of the IMEHD when implanted in the patient.
1.2 This practice is similar to headphone calibration on an
artificial ear in which the sound pressure level (in decibel
sound pressure level (SPL)) measured in the artificial ear can
be converted to patient hearing level (in decibel hearing level
(HL)) using a known transfer function, as defined by ANSI 3.7.
These measurements can then be used to predict system
parameters relevant for patient benefit such as functional gain,
maximum output, and variability. Measurements defined in this
practice should be useful for patients, clinicians,
manufacturers, investigators, and regulatory agencies in making comparative evaluations of IMEHDs.
1.3 The values given in SI units are to be considered the
standard.
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