To increase speech input level, use group amplification systems. There was restricted mobility and the mic was stationary. It had good sound quality.
New forms are more for individual amp.
A wire is placed around table or under carpet. 3-D loops can avoid this by having multiple loops in different areas that vary the phase of the signal. The setup involves a microphone and transmitter on the speaker and a receiver with some type of sound delivery system. The older the child the more likely they'll want to use the neckloop or direct-input. Select hearing aids that will be capable of working in neckloop or direct-input arrangements.