Etymotic DI-15 User Manual

Noise
Reduction
Rating

(HIGHER NUMBERS DENOTE GREATER EFFECTIVENESS)

ETYMOTIC RESEARCH, INC.
ELK GROVE VILLAGE, IL 60007

Federal law prohibits
removal of this label
prior to purchase.

Frequency in Hz 125 250 500 1000 2000 4000 8000
Mean Attenuation in dB 13.2 15.3 16.7 18.3 20.8 18.3 21.6
Standard Deviation in dB 2.5 2.3 2.2 3.1 2.8 2.0 2.9
APV in dB 10.7 13.0 14.5 15.2 18.0 16.3 18.7

H = 17 dB, M = 16 dB, L = 14 dB, SNR = 18 dB

H: Average attenuation characteristics in the high frequency spectrum (>2 kHz)
M: Average attenuation characteristics in the mid frequency spectrum (0.5-2 kHz)
L: Average attenuation characteristics in the low frequency spectrum (<0.5 kHz)

APV (Assumed Protection Value): Europe
SNR (Single Number Rating): Average attenuation characteristics in the standard

frequency spectrum
European Union testing conducted by: CIOP-PIB No.1437, Warsaw, Poland. Attenuation

was determined in accordance with EN352.
The level of noise entering a person’s ear when a hearing protector is worn as directed

is closely approximated by the difference between the A-weighted environmental noise
level and the NRR.

Improper fit of this device will reduce its effectiveness in attenuating noise. Consult the
enclosed instructions for proper fit. Although hearing protectors can be recommended
for protection against the harmful effects of impulsive noise, the Noise Reduction Rating
(NRR) is based on the attenuation of
indicator of the protection attainable against

IMPORTANT:

di-20 earplugs are reusable. With heavy use the

eartips can weaken and could break. Replace every 3-6 months.

ER020670-A

(WHEN USED AS DIRECTED)

THE RANGE OF NOISE REDUCTION RATINGS

FOR EXISTING HEARING PROTECTORS

IS APPROXIMATELY 0 TO 30

EPA

continuous

impulsive

DECIBELS

12

DI 20

LABEL REQUIRED BY
U.S. E.P.A. REGULATION
40 CFR Part 211, Subpart B.

noise and may not be an accurate

noise such as gunfire.

REUSABLE

HEARING PROTECTION

Recommended

for use in

dental offices.

INCLUDES EARPLUGS, CASE & NECKCORD

General Information

™

high-fidelity earplugs are reusable. Foam earplugs muffle

DI-20
sound. These earplugs use a unique acoustic construction that
produces almost equal sound reduction (20 dB) at all frequencies.
All sounds and speech remain clear, just quieter, like turning down
the volume.

eartip

end cap

stem

Insertion

• Before inserting earplugs,
make sure they are clean.

• Grasp the endcap between
thumb and forefinger.

• To ease insertion, pull the top

of the ear outward and upward.
(See illustration.)

• Gently push and twist the earplug

until the eartip seals in the ear canal.

• Moistening the eartip may ease insertion.

Removal

twisting

• Remove with a slow
the seal and avoid discomfort.

• After removal, place earplugs in a clean protective case.

motion to gradually break

Cleaning

• Do not take earplugs apart.

• Clean after each use.

• Wipe clean with a damp cloth as needed.

• Do not immerse earplugs in water.

• Do not clean with harsh chemicals.

• Alcohol is not recommended.

Storage

• Always store earplugs in a clean, protective case.

• Do not store other objects, except a neck cord, in the earplug case.

Warnings

• These earplugs comply with EN-352-2 standard of measurement.

• The triple-flange eartip must be fitted, adjusted and maintained
properly, i.e., seal the ear completely to achieve the expected
attenuation and hearing protection.

• Use earplugs continuously when noise levels are potentially harmful.

• Make certain that the earplugs provide adequate protection for the
noisy environment.

• Regularly inspect the earplugs to assure their continued serviceability.

• Never remove the endcap while the earplugs are in use.

• Failure to follow these warnings may severely reduce the amount
of hearing protection provided by the earplugs.

• If a cord is used, take precautions that it does not catch on

a nearby object.

• This product may be adversely affected by certain chemical
substances.

• Do not clean with harsh chemicals or alcohol.

contact Dental Innovations, 46 Valentine Street Cambridge, MA 02139

For additional information,

www.dentalinnovationsllc.net