Loudspeaker Usage


Mike O’Kane Art & HiSpeak Communications

HiSpeak and Loudspeakers

Here are some tips.

  • Acoustic feedback.

Because of the high amplification involved with loudspeakers, a loud unpleasant feedback squeal can occur if the microphone is not completely sealed to the mask. Once this is understood, it is quite manageable/preventable. Additionally, the yellow microphone lead may have to be moved slightly to minimise any hum.

  • Choosing a loudspeaker.

If you have a ‘boom box’ with 3.5mm jack connection, this might suffice, depending on the model.

You will require a connector lead 3.5mm to 3.5mm (1~ 1.5 metre long depending on circumstances), mono, or stereo.

This lead connects between the headphone jack of the HiSpeak amplifier and the input jack of the boom box.

  • Positioning the loudspeaker.

The loudspeaker is best positioned a short distance from the mask to get good sound quality, and to facilitate a more normal conversation situation.

Alternatively, an iTalk loudspeaker (sold separately) has produced good results.


The portable iTalk (sold separately) is a relatively expensive loudspeaker, however on trials it has truly proved to be a very competent portable loudspeaker, because of the sound quality and the ten watt power output rating. (It comes with connector leads.)

‘It works very, very well.’

Michelle was caring for Josh who had advanced Muscular Dystrophy disease. Once he needed to use the CPAP mask 24/7, Josh became a bit more isolated. The loudspeaker could at least restore a small amount of the independence Josh had lost.

‘Battery life of the loudspeaker is only a day if the speaker unit is left switched on.’

Four rechargeable AA batteries can be fitted. The iTalk loudspeaker is supplied with a charger; note that authority approval would be required for charger use in some oxygen-rich hospital environments.

  • Outdoor situations.

Depending on the type of speaker used, outdoor use might be an option. Once again position the loudspeaker close to the mask; partly to reduce the equipment’s visibility, and partly to get more natural communications