LiSN-S with Prescribed Gain Amplifier

Using the LiSN-S with hearing-impaired people

Research has shown that hearing-impaired people have a reduced ability to use spatial cues to aid in speech understanding. These spatial processing deficits can cause difficulty understanding speech in noisy environments even after hearing aid fitting. The LiSN-S prescribed gain amplifier (PGA) allows audiologists to easily assess clients’ spatial processing ability and determine how much difficulty they are likely to experience understanding speech in background noise. The results of the test can be useful to audiologists in setting realistic client expectations prior to hearing aid fitting and in determining when higher levels of technology may be needed.

The LiSN-S PGA offers both a quick test and full test option. In the quick test only the different voices ± 90 degrees test condition of the LiSN-S is completed. This is the most realistic of the LiSN-S conditions and provides the audiologist with information regarding exactly what degree of difficulty their client experiences in noisy situations. The quick test takes only five minutes to administer. The full LiSN-S incorporates the other three test conditions of the LiSN-S and can be completed when the audiologist would like more detailed information regarding is exactly how much benefit their client can gain from access to spatial cues.

The LiSN-S PGA is accessed through the standard LiSN-S software. Further information about the LiSN-S PGA is available from Phonak

To download a brochure for LiSN-S PGA please click here.

To download a fact sheet on spatial processing deficits please click here.

To see a research poster on the effect of aging and hearing impairment on spatial processing ability click here.


For FAQ click here.



Not being able to see isolates you from objects. Not being able to hear isolates you from people.”(Immanuel Kant). For hearing-impaired people the ability to communicate in our busy society is often hampered by an inability to understand speech in noise even when using hearing aids. My PhD identified spatial processing ability as a major cause of this problem and investigated how we can move forward from here to overcome it. Helen Glyde



LiSN-S hearing-impaired testing