telecoil mode

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telecoil mode

Also called "T-coil mode," it is an optional wireless mode in phones that can be selected for wearers of telecoil-based hearing aids. A telecoil is a tiny wire-wrapped rod (induction coil) that serves as an antenna to pick up electromagnetic energy and convert it to electricity. Phones rated T3 or T4 work best with telecoil hearing aids.

No More Background Noise
When both the phone is transmitting and the hearing aid is receiving in telecoil mode, the local background noise is greatly reduced. Telecoil systems are also used in public venues where an "audio induction loop" ("hearing loop") is a ring of copper wire or tape that encircles a room, counter, drive-through or chair cushion. The loop is connected to the public address system and transmits audio signals to telecoil users.

Neck Loops
Users can also wear a "neck loop," which is a wire worn around the neck that plugs into an iPod, CD player, TV or other sound source using the appropriate cable connector. The neck loop transmits the audio signals to the telecoil in the hearing aid. Bluetooth neck loops are gateways that provide audio conversion from any Bluetooth-enabled smartphone, tablet, laptop or iPod to the hearing aid. See NFMI.

Ditch the Background Noise
When hearing-impaired users see this sign, they can switch their hearing aids to T-coil mode and pick up announcements directly without background noise. (Image courtesy of,
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The counter loop captures the sound of the customer service agent speaking, amplifies it and delivers a wireless signal to a passenger's hearing aid via their t-coil. Each of the ticketing counters, car rental counters and gate counters will have counter loops.
Audio is broadcast via electromagnetic signal to residents wearing hearing aids equipped with telecoils (T-Coils), or special headsets.
The enhancements made to the Switchless T-coil system occurred in a two-fold process.
micro-technology without the use of their hearing aid and switching the aid to the T-coil position," said Waldron.
Previous hearing aid compatible (HAC) technology relied upon inductive coupling to a hearing aid via the T-coil. This breakthrough application from Able Planet, Inc.
To help people who use a T-coil hear better on mobile phones, an amplifying device called a loopset is available.
The electric current that flows through the loop creates an electromagnetic field that can be received and then amplified by a hearing aid equipped with a telecoil (T-Coil) or telephone switch (Lederman & Hendricks, 1995).
The major limiting factor of the audioloop system is the need for the person with the hearing loss to have a hearing aid with a functional T-coil or telephone switch and to know how to effectively use that option.
HATIS works with any prescribed hearing aid that has a T-Coil, and enables people with up to 99 percent hearing loss to use cellphones.
Another drawback of I-T-E hearing aids is the lack of a strong, functional telephone coil (T-coil).
The technology is installed in the telephone and hands-free earphone and interacts with the telephone coil (t-coil) in common hearing aids to capture audio signals from consumer electronic devices.