Filtered Plugs

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This design replicates the natural response of the ear canal so that the sound heard is the same quality as the original, just a bit quieter. The differences in buttons are listed below.

plug 9ER-9
The ER-9 has reduced diaphragm stiffness for less attenuation (reduction).

  • Reduced attenuation (better audibility) then the ER-15
  • For use when a small amount of protection is adequate
  • Good frequency response
  • 9dB attenuation through 2 kHz
  • Available colors - Beige or Brown
  • Style - compact
  • Cost: $130.00/set ($70/set for filters only)

plug 15ER-15
The ER-15 has a diaphragm which functions as an acoustical compliance, as well as an acoustical mass. This results in a smooth and flat attenuation (reduction)..

  • Practically perfect frequency response
  • Provides the same attenuation at all frequencies
  • Minimum occlusion effect with deeply-sealed custom earmolds
  • 15dB attenuation
  • Available coors - Beige or Brown
  • Cost: $130.00/set ($70/set for filters only)

ER-15spER-15SP
The ER-15SP (sports Plug) response is similar to the ER-15, but the 6kHz side branch resonance (which smoothes the ER-15 response above 3kHz) was sacrificed in order to provide the smallest possible size.

  • Smaller then the ER-15
  • 15dB attenuation
  • Used by athletes and others in high noise environments where hearing signals and sounds are important
  • Available colors - Orange
  • Styles - compact
  • Cost: $130.00/set ($70/set for filters only)

ER-25ER-25
The ER-25 has an increased diaphragm stiffness and an acoustical mass channel molded into the button for more attenuation (reduction).

  • Increased attenuation good frequency response
  • Used by drummers and others exposed to high sound levels
  • 25dB attenuation
  • Available colors - Beige or Brown
  • Styles - Original or Compact
  • Cost: $130.00/set ($70/set for filters only)

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