Despite soundfield’s proven benefits, the story of this technology has not always been a happy one, as there are very real issues associated with traditional soundfield systems. These range from in-class echoes and feedback to overly complex settings and incompatibility with FM systems for hearing impaired students.

Today’s 4 key soundfield issues include:

Unwanted noise

Phonak’s Dynamic SoundField system features either one or two ‘line source’ loudspeaker units (depending upon room size and chosen system configuration). This approach offers high directionality and creates much less late reverberation than competing systems.

The result? Dynamic SoundField covers a larger classroom area than its rivals with a clean, high-quality signal, meaning students can hear target sounds comfortably, even with just one loudspeaker in a standard-sized class.


Existing soundfield systems often create screeching feedback when the microphone gets too close to the loudspeaker. This leads to a speaker’s mobility being reduced, which limits teachers, or requires the loudspeaker’s volume to be turned down, in turn limiting student comprehension.

Configuration confusion

Many soundfield systems feature adjustable frequency settings and separate volume controls. Who ‘sets these sliders’? Does a qualified person need calling each time settings are accidentally changed?

Dynamic SoundField removes such confusion by continually monitoring and automatically adjusting its own frequency and volume levels. By measuring a classroom’s actual noise levels and optimizing its frequency response and volume, the system provides optimal Signal to Noise Ratios (SNRs) – integrating the acoustical expertise previously found only in textbooks into an intelligent soundfield system anyone can use. Just plug it in, turn on and teach!

Patchwork complexity

If there are hearing impaired students in class who use FM systems, someone must ‘patch’ together a system that enables both FM and normal-hearing soundfield listeners to hear the teacher’s words. This often results in an FM system’s performance being degraded.

Dynamic SoundField offers an exclusive choice that no other system can match:

  • Transmit speech using SoundField
  • Transmit speech using FM, or…
  • Transmit both optimized signals concurrently to suit a room of mixed listeners

This 3-mode functionality means less buying confusion for education directors, the end of patchworking, and ensures the system is 100% future-proof; after all, it’s not always easy to predict  whether a class will one day include FM-wearing students or not.

Dynamic SoundField

Phonak’s scientists, engineers and audiologists designed Dynamic SoundField to address each of today’s issues and to be completely future-proof. The outcome is a product that helps students hear the teacher’s voice more easily than ever before, that teachers love due to its ease of use, and that audiologists appreciate for its outstanding sound quality and instant FM compatibility.

Learn more about Dynamic SoundField’s features here


“Using Dynamic SoundField in the classroom has enhanced the teaching and learning experience. The students enjoy using it when reciting their "When I Grow Up" speeches. The system also helps the students focus on instruction. It is such a useful teaching tool”

Beth Ann Wilson, teacher, Michigan, US