Disposable foam eartips for ER-3C Insert Earphones

ER3-14A Foam eartips (regular, 13 mm) for AEP and PTA 50 pcs. $36.10
ER3-14B Foam eartips (baby, 10 mm) for AEP and PTA 50 pcs. $36.10
ER3-14C Foam eartips (jumbo, 18 mm) for AEP and PTA 24 pcs. $36.10
  • Highlights
  • Features
  • Specifications
  • Available variants
  • Warranty
  • Downloads
  • Related products

Etymotic Research ER3-C Insert Earphones have become industry standard around the world in audiometry and Auditory Evoked Potential (AEP) testing.


Etymotic Research ER-14A, ER-14B, and ER-14C Disposable Foam Eartips have become industry standard around the world for their use with ER-3C Insert Earphones.


Disposable eartips are recommended for most uses.  They are an efficient way of infection control in hearing testing, particularly in Audiology and Otolaryngology practices, especially in pediatric settings.

There are three types of Etymotic Research disposable eartips for use with ER-3C Insert Earphones – Foam Eartips, PVC Eartips, and Gold-foil-plated Tiptrodes for non-invasive Electrocochleography (ECochG).

Disposable foam eartips are available in three diameter sizes:

o Standard 8-13 mm – ER3-14A,

o Small 6-9 mm – ER3-14B,

o Large 10-14 mm – ER3-14C.


CAUTION: All eartips, regardless of material or construction, are for single person use only. Replace eartips for each test session.


Do not reuse eartips.


External noise exclusion


ER3-14 Foam Eartips provide greater than 30-dB exclusion of background noise. As insertion depth increases, the amount of attenuation increases. Deeply-inserted ER3-14 foam eartips can provide noise exclusion equivalent to a single-wall booth.


Testing to audiometric zero can be done reliably whenever the SPL of the background noise is less than 45 dBA.


ER-3C Insert Earphones with ER3-14 eartips have significantly greater attenuation than traditional supra-aural earphones and circumaural earphones.


Interaural attenuation and masking


High interaural attenuation of ER-3C Insert Earphones, achieved due to ER3-14 eartips, reduces the need for masking air-conduction thresholds when using Insert Earphones.


Interaural attenuation is significantly higher with insert earphones, making it possible to use lower masking levels in the non-test ear.


Interaural attenuation increases with eartip insertion depth.


Test reliability


Insert earphones eliminate all three major problems associated with traditional supra-aural earphones:


1. Good noise exclusion at low frequencies, as opposed to poor noise exclusion in supra-aural earphones that invalidates tests done outside a sound booth.


2. High interaural attenuation, as opposed to low interaural attenuation in in supra-aural earphones.


3. Correct high-frequency thresholds in patients with collapsed ear canals, as opposed to erroneous high-frequency thresholds resulting from collapsed ear canals when using traditional MX-41AR earphone cushions.


Wilber et al. (1988) also found less variability, on average, across subjects using insert earphones as compared to traditional supra-aural earphones.


Frequently asked questions about foam eartips


1. Can I disinfect and reuse the foam eartips?


No. Hard, non-porous objects and surfaces are the best candidates for disinfection. Unfortunately, insert eartips are neither. They are porous and soft and do not disinfect well.


More importantly, if they are soaked in a solution, the solution is almost certain to stay within the tips thus posing a health hazard to the person who uses it. This is particularly true if someone soaks such a tip in glutaraldehyde (Cidex, Wavicide). The residual glutaldehyde is toxic to the person who receives this tip in the ear.


2. Can I use the foam eartips on several patients before discarding them?


No. Insert eartips were designed to be a single-use item, thrown away after each use. Items like insert eartips can become contaminated by the ear or the hands, and can present a health hazard to the next patient, particularly those with diminished immune systems.


Audiology patients often have weakened immune systems due to age, underlying disease state (diabetes, HIV), or drug treatment (chemotherapy). Ubiquitous organisms passed from person to person via insert eartips can cause opportunistic infections. Insert eartips should always be thrown away after a single use. Supporting research is as follows:


a) Breathnach, Jenkins and Pedler (1992) found that 26 of 29 stethoscopes were contaminated with staphylococci, and concluded that stethoscopes were a vector for staph infections.


Breathnach, A.S., Jenkins, D.R. & Pedler, S.J. (1992) Stethoscopes as possible vectors of infection by staphylococci. British Medical Journal, 305:1573.


b) Brook (1985) evaluated airline headsets worn by 20 male passengers and found them to be contaminated with staph aureus, staph epidermis, streptococci and corynebacterium. This study led to airlines using disposable headphones and better disinfection of headphones.


Brook, I. (1985) Bacterial flora of airline headset devices. American Journal of Otolaryngology 6:111-114.


c) Bankaitis (2000) examined in-the-ear hearing aids and found that ten of ten were contaminated with bacteria and fungus. While most of the bacteria found on the hearing aids were of the varieties normally found in the ear, some were not normally found in the ear, like fecal-born bacteria. This demonstrated that items that come in contact with the ears can become contaminated by the ear or by the hands.


Bankaitis, A.U. (2000) Hearing aid infection control (IRB #10679) submitted for publication. St. Louis University, St. Louis, MO.



Exclusion of background noise

≥ 30 dB (equivalent to a single-wall booth)

Background noise for reliable testing to audiometric zero

<45 dBA

Part Number – Device ID






Foam eartips (regular, 13 mm) – for AEP and PTA

50 / pack

13 mm



Foam eartips (baby, 10 mm) – for AEP and PTA

50 / pack

10 mm



Foam eartips (jumbo, 18 mm) – for AEP and PTA

24 / pack

18 mm


Single-use items (eartips, etc.) are not covered.

ER-3C Insert Earphones.


ER3-21 Sound delivery tubes with adapters – Red and Blue.


ER3-28S Electrode eartip cable for Tiptrodes – pair, Red and Blue.

Request a Quote for
Disposable foam eartips for ER-3C Insert Earphones

To contact us, please complete the form below and click on "Request Quote".

Required fields are marked with a *

  •  Please check if you would like your name added to our mailing list.

Please Click I’m not a robot box and click the “Request Quote” button below to submit your message.