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3M™ E-A-RTONE™ Insert Earphone 3A Replacement Sound Tubes 420-2003, 4 EA/Case

3M Product Number 420-20033M ID 70071615895UPC 10080529510126
  • *The NRR may overestimate the hearing protection provided during typical use.
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Specifications
Attribute Name
Value
Brand
E-A-R™
Case Quantity
4
Hearing Protection Style
Probed for Fit Testing
Product Series
E-A-RTONE
Product Type
Insert Earphone
Details
  • *The NRR may overestimate the hearing protection provided during typical use.

This E-A-RTONE™ 3A Insert Earphone accessory is a clear, polyurethane 9.85" replacement sound ("front") tube for all standard E-A-RTONE™ 3A Insert Earphone models.

By directly coupling to the test subject's ear canal, via disposable foam E-A-RLINK™ eartips, the E-A-RTONE™ 3A Insert Earphone for audiometric testing provides both performance and reliability advantages over traditional supra-aural earphones. Benefits (in comparison to supra-aural/TD H-style earphones) include;
- Improved ambient noise attenuation
- Greater interaural attenuation
- Facilitated infection control (via disposable eartips)
- Elimination of collapsed canal artifact
- Better Test/Retest Reliability
- Reduced Occlusion Effect for BC testing

This E-A-RTONE™ 3A Insert Earphone accessory is a clear, polyurethane 9.85" replacement sound ("front") tube for all standard E-A-RTONE™ 3A Insert Earphone models. Front tube replacement is recommended on an annual basis or as required.

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