SP–001 AUTOMATIC DISPLAY
Signal 21 silver earplugs
002 / PRODUCT PRINCIPLES
01

SOUND
PROTECTION

Designed to reduce excessive environmental volume while supporting continued listening.

02

SIGNAL
CLARITY

Filtered protection intended to preserve more detail than disposable foam alternatives.

03

EVERYDAY
EQUIPMENT

A reusable system developed for clubs, festivals, studios, transit and work environments.

003 / SOUND CALIBRATION

PRODUCT FIELD
RESEARCH

Environmental testing and sound studies documenting how Signal 21 fits into the wider Retrofit system.

RFT–001 / SOUND CALIBRATION PLAYING
FIELD TESTS
FR–001
OPEN-FIELD TEST

ENVIRONMENTAL BASELINE

01
FR–002
TRANSIT TEST

URBAN CALIBRATION

02
RELEASE STATUS / PENDING

ENTER THE
SOUND SYSTEM.

Receive the release date, final specifications, inventory access and new field research.