Welcome to the NAL CAPD Website

The National Acoustic Laboratories (NAL) is the research arm of Australian Hearing, which is an Australian Government agency and one of the largest hearing service providers in the world.

For many years NAL has been involved in research into central auditory processing disorders (CAPD). This research has resulted in the development of software to aid in both the diagnosis and remediation of specific types of CAPD.

From the left-hand panel of this website you will be able to find information about the Listening in Spatialized Noise – Sentences Test (LiSN-S), which is used to diagnose spatial processing disorder or (SPD). SPD is a specific type of CAPD which results from an inability to utilize the directional cues embedded in sound in order to separate the speech we want to hear from background noise. Children with SPD have particular difficulty understanding speech in noisy environments, such as the classroom. SPD is particularly common in children who have a history of recurrent otitis media (glue ear) and can occur even though their hearing thresholds, as measured by routine audiological tests, are within the normal range.

Our research has also found that most people with a sensorineural hearing loss have some degree of SPD. The LiSN-S (Version 2.003) has a prescribed gain amplifier (PGA) built into the software so that people with a hearing impairment can be assessed for SPD. You can find out about the LiSN-S PGA for hearing-impaired people and strategies for dealing with SPD if you have a hearing loss in the LiSN-S section of this website.

You will also be able to access information about the LiSN & Learn auditory training software. The LiSN & Learn was developed to remediate SPD. Our research has found that SPD is reversed in children with normal hearing who train with the LiSN & Learn software over a ten week period.

There are additional sections on CAPD in general as well as answers to frequency asked questions (FAQs) about the LiSN-S and LiSN & Learn. A short video by Professor Harvey Dillon, outlines NAL's current recommendations for testing and remediating several forms of CAPD.

Of course, our research is ongoing, so in the Current Research section you can find out about the projects that we are undertaking at the moment. If you would like to take part in one of these studies go to the Be in a Study section, which will provide information about projects for which we are currently recruiting.

There is also a section on our research Publications with links to abstracts where applicable.

For information on locations where LiSN-S testing and LiSN & Learn remediation are available please see the Accessing LiSN Testing and Remediation section of this website.


Sharon Cameron

Dr Sharon Cameron
Senior Research Scientist

Helen Glyde

Dr Helen Glyde
Senior Research Audiologist

Harvey Dillon

Dr Harvey Dillon
Research Consultant

Nicky Chong-White

Dr Nicky Chong-White
Senior Research Engineer

Kiri Mealings

Dr Kiri Mealings
Research Scientist

Taegan Young

Taegan Young
Research Audiologist

LiSN-S package