Etymotic Research er-4b Broschüre

Musicians practice and perform in a variety of different

settings and they are exposed to high levels of sound,
sometimes for long periods. They require different amounts 
of protection, depending on the sound levels they encounter
during rehearsals and performances.

As designated by the number classification, ER-25s and 

ER-9s provide either more or less attenuation than ER-15s.
Some musicians use one type of attenuator in one ear and 
one type in the other, depending on the source and location 
of the sound.

For more in-depth information regarding the clinical assessment of musicians,
room acoustics, the physics of musical instruments, and environmental 
strategies used to reduce noise exposure for musicians, refer to: Chasin, M.
Musicians and the Prevention of Hearing Loss. Singular Publishing Group. 1996.

ER-25 Musicians Earplug

ER-15 Musicians Earplug

Standard

Partially countersunk

Countersunk

ER-9 Musicians Earplug

Discoloration, shrinkage, cracking, hardening of earmold material, deterioration in performance.

Moisten the mold for ease of insertion.

Pull the ear outward and upward while easing the mold into the ear canal.

Remove button from mold. Use water and mild soap on the mold only.

Dry mold thoroughly before replacing button.

Provides uniform 15 dB sound

reduction across all frequencies

Provides 25 dB of relatively flat

sound reduction across 

all frequencies

Identical dimensions. Change buttons for different listening conditions.

Brown

Beige

Red

Blue

Flat 9 dB sound reduction through

the mid range. Same high 

frequency protection as the ER-15

Clear

* ER-9 buttons are not available in red or blue.

Etymotic Research manufactures and tests each button for proper resistance and compliance
values before they are shipped to earmold laboratories. Earmold labs that are authorized 
by ER to make Musicians Earplugs are required to use an acoustic mass meter to verify 
that Musicians Earplugs have the correct volume of air in the sound bore to produce flat
attenuation. Visit our website www.etymotic.com for a list of authorized earmold labs.