Layouts Overview

There are 6 basic types of loop layout for an audio induction loop system:

What do these pictures mean?

Overspill (counter) loop

• One to one communications
• Counters, reception desks, intercoms etc.
• 1 small amplifier

Perimeter loop

• Area coverage, spaces up to 25m wide with NO METAL LOSS
• Area coverage, spaces up to 2-6m with metal loss (depends on level)
• Spill allowed up to 4x width away
• 1 loop amplifier required

Single array

• Areas with metal loss but wider than 2-6m maximum
• Only for fixed seating areas, e.g. theatre, classroom
• 1 loop amplifier required

Cancellation loop

• Areas suitable for a perimeter loop where spill control is required on one side only
• Adjacent classrooms etc.
• 1 loop amplifier required

Low loss array

• Large areas with metal loss
• Areas in excess of 25m wide
• Balconies in theatres

Ultra-low spill array

• Areas where spill must be controlled
  • Adjacent rooms
  • Confidentiality
  • Nearby interfering systems
• Large areas with metal loss / in excess of 25m wide

 

 

What do these pictures mean?

Ampetronic colour plots show the distribution of magnetic field around a loop system, from the side or from above. Black is -40dB below the target field strength, effectively background noise only. Yellow areas meet the target field strength, white exceeds it. The plots give a good indication of how well a loop will meet the requirements for your application.