Interacoustics Affinity 2.0 Additional Information page 306

2.0
Affinity Additional Information
As an add-on the Affinity
TMFS is short for Telephone Magnetic Field Simulator. It is a transducer that produces a magnetic field
similar to the signal coming out of traditional telephones. In other words the TMFS coil attempts to simulate a
telecoil for the purpose of calibrating hearing aids with inductive coils according to ANSI S3.22:2003
Place the hearing aid on top of the TMFS coil as shown on the illustration below.
It is important to note that telecoils may still be tested without the TMFS coil as the Affinity
built in magnetic field which is different from the field created by the TMFS coil. However this will not be in
accordance with the ANSI standard.
2
test boxes also includes a TMFS coil shown below.
The magnetic field is generated at the circle
indicated on the TMFS coil. The hearing aid
telecoil should be located as close as possible.
Page 275
2.0
test box has a