The Lybarger dual diameter system employs a center section of 1/32" tubing in a non-occluding earmold to produce a resonator that provides an average of 12dB additional gain in the range from 4000Hz to 7000Hz. this configuration is designed for losses that are normal out to 1500Hz - 2000Hz and then drop off sharply.
Free Field
This is another earmold belonging to the non-occluding family. The canal portion of the mold is at the top of the canal, giving the greatest ammount of open space in the aperture of the canal. This mold is recommended when there is a call to reduce or eliminate frequencies below 1000Hz.
Ear plug
Ear plugs can be used as hearing protection or as swim plugs. Available in all soft materials and "fun colors". Samples of ten different "fun colors" available upon request.