2820A-XX & 2825A-XX SERIES TWO DIVER COMMUNICATOR USER MANUAL
282XA-UM
REV 5.0
20
back and adjust the DEPTH CONTROL. Once the best speech quality settings are
found, the NOISE REDUCTION FILTER can be adjusted, if necessary, to reduce
any background noise.
Operating in 2-Wire and Full Duplex (4-Wire) modes are possible with the HSU. In
2-Wire mode, the tender's push-to-talk switch interrupts signals from the diver. In
Full Duplex mode, the tender will hear the diver at all times and tender must use a
headset to talk to the divers without using the push-to-talk switch. Use of a headset
to monitor helium speech is strongly recommended to enhance intelligibility.
4.8
ACTIVE NOISE REDUCTION (ANR) OPERATION
4.8.1
Not all noise cancellation headsets are the same. Amron’s new series of Active
Noise Reduction (ANR) headsets isolates and reduces topside noise in very loud
environments dramatically, allowing the tender and divers to communicate more
clearly and comfortably with increased intelligibility. The headset is available with
dual muffs for optimum noise reduction or a single muff.
4.8.2
Amron’s Active Noise Reduction Headset features two key technologies,
unmatched active noise reduction and unique dynamic noise cancelling
microphone. The proprietary electronic circuitry design shapes and equalizes
incoming audio signals to provide a clean full sound quality that enhances
intelligibility of the intercom audio.
4.8.3
The headsets ergonomic design provides unmatched comfort and performance
allowing it to be worn longer. Adjustable headband provides comfortable settings
for a wide variety of head sizes and shapes with lightweight, but durable material.
Proprietary cushion design provides a critical acoustical seal around the ears (even
over glasses) that provides passive noise reduction, low clamping force, and user
comfort for extended use.
4.8.4
Durable and robust design made to endure the wear and tear of everyday use, and
the temperature and environmental extremes in outdoor environments such as
sunshine, rain, and snow.
4.8.5
When used with Amron’s communicators with the Inhalation Noise Reduction (INR)
feature, you now have a complete system that can eliminate both diver inhalation
noise and topside noise, making Amron’s communicators the most versatile and
unique in the world.
Models Available:
2890-28
Noise Cancelling Deluxe Headset with Boom Mic (Dual Ear Muffs)
2890SM-28
Noise Cancelling Deluxe Headset with Boom Mic (Single Ear Muff)
