Contributing to Design
Over the years, designers, manufacturers and suppliers of specialist equipment have called upon the wide technical and practical experience of Ewing Foundation Technicians when developing or updating their products. Some of the suggestions and ideas put forward by the Technicians have been adopted and proven beneficial.
The Variable Attenuator
In response to the development of high-powered hearing aids with little or no manual control of volume, a variable attenuator with a stetoclip (listening stick) was developed. This is now readily available and forms a basic part of the Teacher of the Deaf toolkit.
Bone Anchored Hearing Aid (Baha®) Listener.
Recognising the need to monitor Baha® and Baha® plus FM combinations, a simple device was developed to allow a normally-hearing person to listen in to the output. This enables them to make a subjective assessment as to the quality of sound and the efficacy of any radio aid system connected to it.
The device is now available from a commercial source at a reasonable cost.