OSPL90 and Eargo Devices
Output Sound Pressure Level 90 (OSPL90) This is the amount of sound the hearing aid will put out when you put in a 90dB sound. That’s the sound of a screaming child or a lawnmower.
Maximum – the most sound the device can put out
HFA – the average level of just the high frequencies
RTF – the average increase of volume from 90dB
The Eargo device has an Maximum OSPL90 of 120dB @ 900Hz and an HFA OSPL90 of 116dB SPL