Effects of cup, cushion, headband force, and foam lining on the attenuation of earmuffs

@inproceedings{Zannin1999EffectsOC,
  title={Effects of cup, cushion, headband force, and foam lining on the attenuation of earmuffs},
  author={Paulo Henrique Trombetta Zannin},
  year={1999}
}
The essays were undertaken using an artificial head and a diffuse sound field, according to DIN ISO 4869‐1. Increasing the cup mass improved the noise attenuation by 17 dB at 100–300 Hz. The coherence function between cup vibration and sound pressure inside the cup has shown that a great amount of sound energy is transmitted to the inside of the cup, at low frequencies. The foam lining of the cup clearly attenuated the sound in the frequency between 2000 and 8000 Hz. Increasing absorbent mass… CONTINUE READING