An improved hearing protection device intended to be inserted into an external auditory meatus of a user, having a housing structure (2), a passive tuning element (12), and a passive, nonlinear acoustic filter (11). The tuning element (12) and the acoustic filter (11) may be supported in series by the housing structure (2). The tuning element (12) may be or include a diaphragm (122), a resonator (121), or both. The housing structure (2) may support a diaphragm (122) of the tuning element (12) at its circumference, and may provide cavities (23A, 23A1) on both sides of the diaphragm (122). In some embodiments electronic components are included in the hearing protection device to counteract insertion loss provided by the passive element (1), and restore natural hearing for low to moderate sound pressure levels. Communications devices may also be incorporated into the hearing protection device.
