Our district audiologist wants to put all DHH students on personal FM and remove the class soundfields altogether. I find conflicting research on this. The DHH teachers don’t want to get rid of the class soundfield systems. Can you please confirm either the benefits or detriment of keeping the soundfield in place in addition to personal FMs?
By class soundfield system, I assume you mean a room equipped with two or more speakers that broadcast the desired signal into the desired space. The problem with these systems is that everyone in the room is exposed to the signal and, depending upon where the deaf or hard-of-hearing student is sitting, there could loss of signal strength over distance. Personal FM systems have the advantage of being set up specifically for the user, whether the individual is using a hearing aid (s), a cochlear implant, or both. The signal is clear, coming directly from the teacher to the student. The signal does not lose strength over classroom distance, and the teacher can use one microphone to connect to several students at the same time. Also, there is no “carry over” into adjoining classes as there might be with a sound field system (depending upon the decibel level of the signal). In my opinion, the FM is superior though more expensive. Two additional notes: (1) Students with milder hearing losses may do best with soundfield system while those with severe to profound losses are likely to do better with FM. (2) It is unclear why a person would remove an existing soundfield system unless maintenance is an issue.