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output sound pressure level (acoustics) (OSPL)

TheDINIEC 60118 standard defines the most important terms and measured values for hearing aids. This also includes the output sound pressure level (OSPL).

It is measured as OSPL90 and refers to an input sound pressure level of 90 dB and one or more specified frequencies. For this measurement, all gain settings are set to the highest gain. As a rule, the measured OSPL90 values are identical to the saturation level. In addition to the classic OSPL90 value, there is also the HFA-OSPL90 value, High Frequency Agrage (HFA), at higher frequencies. This is the average of the OSPL90 values at 1 kHz, 1.6 kHz and 2.5 kHz.

The OSPL90 value is the most important measurement of all hearing aid measurements, as it is the basis for the reference test setting.

Englisch: output sound pressure level (acoustics) - OSPL
Updated at: 16.07.2020
#Words: 124
Links: standard (STD), sound pressure level (SPL), decibel (dB), measurement, arsenic (As)
Translations: DE

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