Premo announced two high sensitivity coils for use in hearing aid applications. The TP0602-TC is wound with thin copper wires less than 25 micron (up to 0.012mm diameter) and inductance values range from 40 to 170mH.
This telecoil achieves a high sensitivity to magnetic field in the 1kHz operating frequency of most hearing aids. The ferrite core material provides a stable performance in the -10 to +40°C temperature range. The ZTC0602 (Tx-coil) is specially Z-axis designed for mobile phones to transmit an audio signal to a hearing aid device.
Typical inductance range from 90 to 180µH and the Rdc value for the Z-TC0602 coil ranges from 4 to 32 ohms. The devices are delivered in SMD configuration for easy integration in automatic PCB assembly processes, avoiding the handling of these devices that could damage wire windings.
The Telecoils enable users to control the volume of their hearing aid and reduce background noise when using cell phones in noisy places. Users can switch the phone coil between manual and automatic modes to create the required magnetic field to induce the signal into the hearing aid's coil. These series, TC0502, TP0602-TC, TC0902 and TC1102 and ZTC0602, are available with "custom" electrics characters according to customers' requirements.
Visit Premo at http://www.grupopremo.com.
This article originally appeared on EE Times Europe.