10/31/2022
For my first post after the long absence, I'm going to address a question I'm asked frequently by parents and professionals alike: what are the Ling 6 sounds, and how do audiologists use them? There are misunderstandings about the Ling 6 Sound Test. First, some background: this sound test was developed by Daniel Ling and published in 1976 as a way to perform a quick and easy check for access to speech sounds. The six sounds (/ah/, /ee/, /oo/, /mm/, /sh/, and /ss/) represent frequencies across the speech spectrum. In other words, they cover a range of different pitches that English speakers hear. The test is used by audiologists as well as speech-language pathologists, teachers, and parents as a quick way of determining whether a child or adult can hear those sounds. The person administering the test says the sounds at a certain distance from the deaf or hard of hearing (DHH) person, usually 3-6 feet and without visual cues, and the DHH person repeats the sounds they hear. For young children, picture cards and toys can be used to represent the sounds.
Because the Ling 6 sounds represent frequencies across the range that people hear spoken English, they provide an easy way to determine if someone isn't accessing speech sounds within part of that range. For example if I am mapping a cochlear implant and the DHH person is having trouble detecting or identifying the sound /ss/, I can make adjustments to their programming in the high frequencies. As an audiologist, I also use the Ling 6 sounds when I am listening to hearing devices myself: if I am performing a listening check on a device and its owner isn't present, I can use the Ling 6 as a quick check on problems with the device itself. Recently some professionals have transitioned to using 4 additional sounds (/zz/, /jj/, /n/, and /h/) to provide even more information. All these sounds together make up the LMH 10 Sound Test.
The Ling 6 and LMH 10 are great tools, and I use them every day as an audiologist. But a common misunderstanding about these tests is that if a child or adult hears all the sounds, they have perfect access to spoken language. This is not true. The ability to detect or identify all these sounds does not tell us how the person is hearing spoken words, phrases, and sentences in the real world. Also, the English language has more than 10 sounds! When administering these tests, knowing their limitations is just as important as knowing their benefits. We should not expect that a person who can hear these sounds has good hearing ability for all spoken language.