NFD developed the SSI for use in New Zealand early childhood centres and primary schools – to help children learn the importance of protecting
their hearing and offers teachers a tool to keep the noise levels down.

See the problem with noise

In 2010 NFD trialled the SSI prototype in 20 New Zealand early childcare centres , where it was welcomed by teachers. It was then refined to its present form – about the size of a paperback book.

How does it work?

Mounted on a wall, the SSI absorbs sound through a frequency-sensitive filter that mimics the human ear. As the surrounding noise increases, the
traffic lights flash: Green = 80dB, Amber = 85dB, Red = 90dB. The red light flashing is a warning signal to stop the noise, as it’s in the danger zone for causing hearing loss.

The SSI comes with four AAA batteries and a charger. The batteries will last up to four weeks after a 10-hour charge. You can also run it off mains power through the charger (with the batteries removed).

Who is using it?

The SSI is in use in over over 1100 New Zealand early childhood centres and primary schools. Children see at a glance when they need to quieten down. Teachers report that students regulate their own behaviour according to the colour of the lights.

Here is a sample of many positive comments we’ve received from New Zealand teachers.

   Mangere Bridge Kindgarten
  'It is an excellent way for children to self-monitor noise levels and adjust their activitites.'

   Cameron Ross, Torbay primary school
  'It has been fascinating using the Safe Sound Indicator in our classroom. It has highlighted to us what noise level is safe for the children to work at to
   preserve their hearing for life.'

  Te Akoranga Kindergarten, Kawerau
  'We’ve got it in the kitchen area. It’s creating lots of conversation and awareness of loud noise'

  Raglan Childcare & Education Centre
  'It has already made a difference to our noise levels, with children self-montoring … by simply glancing up at it. The improvement is much
  appreciated by our teachers.'