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- [19] Passive augmentations in hearing protection technology circa 2010 including flat-attenuation, passive level-dependent, passive wave resonance, passive adjustable attenuation, and adjustable-fit devices: Review of design, testing, and research International Journal of Acoustics and Vibrations, 2010, 15 (04): : 187 - 195
- [20] Passive Augmentations in Hearing Protection Technology Circa 2010 including Flat-Attenuation, Passive Level-Dependent, Passive Wave Resonance, Passive Adjustable Attenuation, and Adjustable-Fit Devices: Review of Design, Testing, and Research INTERNATIONAL JOURNAL OF ACOUSTICS AND VIBRATION, 2010, 15 (04): : 187 - 195