Learn more about Dynamic SoundField by Phonak with this helpful list of Frequently Asked Questions.

Simply click the question you have using the list below.
If you have a question that is not answered here, please let us know.


What is Dynamic SoundField?

Dynamic SoundField is a unique soundfield classroom amplification system from Phonak which increases the speech intelligibility in classrooms in an extremely effective way.

The system automatically monitors the background noise level in the classroom and adapts the gain level of the speaker’s voice accordingly and dynamically. This ensures excellent intelligibility of the teacher’s voice, independent of whether the children are quiet or whether there is a high noise level in the classroom. This, in effect, applies the very successful and proven principle of Phonak’s successful Dynamic FM technology to the soundfield world.

What are Dynamic SoundField’s key features?

  • Unique ‘line source’ loudspeaker unit: 12/15 high quality loudspeakers per loudspeaker array (DigiMaster 5000/7000)
  • Fully automated settings: dynamically adapted gain setting
  • Built-in FM compatibility: one inspiro serves both DigiMaster and FM receivers
  • Intelligent frequency hopping: avoids interference with other digital systems (WLANs, Bluetooth)
  • Future-proof: USB connection allows easy future internet upgrades.

Rooms & Positioning

How many rooms per building can use Dynamic SoundField?

Dynamic SoundField systems can be used without restrictions in all classrooms in a school building, no matter how many. Its intelligent digital transmission technology, developed by Phonak, ensures that no channel switching is required, as it is for instance by today’s infrared soundfield systems.

Where should the DigiMaster 5000 loudspeaker be placed in the classroom?

A school is free to place the DigiMaster 5000 loudspeaker anywhere in the room it likes, either on its floor stand or mounted on the wall. Ideally, the DigiMaster 5000 should either be placed in the front or in the back of the class.

For ideal placement, it is also recommended to take the following aspects into account:

  • Avoid noise sources between the DigiMaster 5000 and students
  • Avoid long power cables between the DigiMaster 5000 and the power socket
  • Find a place that disturbs neither teacher nor students

What sized rooms can the DigiMaster 5000 be used in?

The DigiMaster 5000 is designed for use in rooms measuring up to 100 square meters (1076 sq. ft) or roughly 100 listeners.

What sized rooms can a pair of DigiMaster 7000’s be used in?

One pair of DigiMaster 7000 loudspeakers is designed for use in rooms measuring up to 300 square meters (3230 sq. ft) or roughly 300 listeners.

Configuration & Connection

Can I use a DigiMaster 5000 loudspeaker with a DigiMaster 7000?

No. Only a pair of DigiMaster 7000 loudspeakers can be used simultaneously with the same inspiro transmitter.

Can I use two DigiMaster 5000’s together?

No. A DigiMaster 5000 is designed to be used alone. Only a pair of DigiMaster 7000 loudspeakers can be used simultaneously with the same inspiro transmitter.

Can I use Dynamic SoundField with an interactive whiteboard or TV?

The DigiMaster 5000 loudspeaker features an audio input socket. With this an external audio source, such as a smartboard, TV or computer can easily be connected.

How do I connect to an interactive whiteboard that doesn’t have an audio output?

This is possible using the whiteboard-connected computer and 2 inspiro transmitters that are already connected to a Phonak MultiTalker Network (MTN).

One inspiro is the initiator or ‘master’ device. This is worn by the speaker. You then require a male 3.5mm (0.13-inch) to 2 female 3.5mm splitter (bought separately).

Plug the splitter’s male end into to the computer’s headphone output. Then connect one female end to the DigiMaster, and the other to the secondary inspiro.

Set this secondary inspiro to ‘iPod Nano’ setting (see Settings/Audio input/Audio device/ iPod nano) and adjust the computer’s output volume to 2/3rds of its maximum.

Transmission & FM

Which wireless transmission technology does Dynamic SoundField use?

Phonak has developed a digitally modulated transmission technology for Dynamic SoundField, called DM (Digital Modulation). This works within the worldwide license-free 2.4 GHz band. DM does not require any channel management and is extremely robust against interference from other digital wireless systems such as WLANs or Bluetooth systems.

How do I combine Dynamic SoundField with Phonak FM systems?

inspiro by Phonak is the transmitter for both Dynamic SoundField and Phonak FM systems in school. Therefore a teacher using Dynamic SoundField and who has hearing-impaired children wearing Phonak FM systems in the same classroom only needs to wear one inspiro transmitter. This inspiro transmits the teacher’s speech signal to the DigiMaster loudspeaker whilst simultaneously transmitting the same signal to the FM receivers on the children’s ears.

The inspiro transmitter can be operated in three modes:

  • as a Dynamic SoundField-only transmitter emitting DM (2.4GHz)
  • or a FM transmitter emitting FM (169 – 220MHz)
  • or in combined mode, emitting DM and FM in parallel


Can Dynamic SoundField handle multiple people speaking in a classroom?

Phonak’s MultiTalker Network, which was successfully introduced in 2008 for FM applications, is also available for Dynamic SoundField. This network enables up to 10 speakers to talk to the class, whether teachers, children or assistants. The MultiTalker Network provides a very clean speech signal because only one microphone is ‘open’ at any one time. It also eliminates the need to carefully select different frequencies for any additional microphones, as is required by existing infrared systems.

What kind of microphone can be used with a DigiMaster loudspeaker?

The DigiMaster can be used with either Phonak’s face-worn EasyBoom microphone (for the best sound performance) or shirt-worn iLapel microphone (for simplicity and flexibility). Both accurately pick up speech without amplifying the surrounding noise.

Energy use

Is Dynamic SoundField an energy-saving system?

Dynamic SoundField fulfills the latest Eco design standards for Europe released in January 2010. When the DigiMaster 5000 is switched off, its power consumption is less than 0.5W. In stand-by mode it is less than 1W. During normal operation in class, the DigiMaster 5000 typically consumes about 3W. This is a mere fraction of the energy used to light a classroom and hence a fraction of the energy cost.