This article refers to:
Mead C. Killion, Tim Monroe & Viorel Drambarean: Better protection from blasts without sacrificing situational awarenesss. International Journal of Audiology. 2010;50:S38–S45.
The paper by Killion et al. stated that the authors had no (potential) conflict of interest. However, all three authors are employed by Etymotic Research, Inc.