- Category: News
- Created on Monday, 30 November 2015 12:00
- Hits: 1601
Mimosa Acoustics has announced a new software release designed mainly for clinical researchers. The latest handheld OtoStat wideband immittance and DPOAE system is now capable of forward-pressure level (FPL) calibration. By calibrating using FPL, errors up to 20 dB stimulus-level are eliminated, and variability due to probe insertion depth and angle is greatly reduced. This is a limited edition release for early adopters who wish to investigate the benefits of FPL for their specific clinical populations and research interests.
OtoStat 2.1 features:
- Based on the OtoStat 2.0 handheld touchscreen device, with OtoStation patient management software
- In-the-ear calibration with FPL or SPL as the target level
- Extended data export to Excel for both wideband immittance and DPOAE
- Configurable parameters saved as named protocols
What is FPL?
In a sealed ear canal, FPL is the forward-going or incident waveform on the tympanic membrane. Regular in-the-ear calibration measures the pressure at the probe microphone, which is a mix of forward and reflected pressure components. By using a specially calibrated probe, the forward going component can be derived and the stimulus level adjusted so that it is constant across frequency. This improves measurement accuracy and reliability.
Is additional time or effort needed to use FPL?
No. If you're already making wideband immittance+DPOAE measurements, no additional time is needed. The FPL information is derived from the immittance measurement. If you're only making DPOAE measurements, the immittance test takes the place of the regular DPOAE calibration, and in addition you get information about middle-ear status which you can use to help interpret the DPOAE results.
Where can I find out more about FPL and DPOAEs?
An overview and example is on the June-October 2015 guest editorial.