Hearing aids can boost frequencies up to about
However very low frequencies and higher frequencies do not
need to be boosted because they are outside the main speech areas.
However can anyone suggest a pragmatic lower & upper
bound "cutoff" frequency where we don't really need to boost speech
The upper speech frequency of very young, female speakers
I assume would be the upper limit ... does anyone know this
How about the lower end? What low frequencies do we not
need to boost? I assume this would correspond to the lowest freq edge of a deep
adult male voice.