Where sounds are on an audiogram


Karen Anderson has been an audiologist for almost 30 years, specializing in educational audiology, identification and intervention of infants with hearing loss, serving students who are hard of hearing and classroom acoustics.

Dr. Anderson has been the author or co-author of numerous test instruments, articles, and handouts useful for school staff or parents and has presented widely on these topics.

On this website are pdf versions of commonly requested tests and handouts. Sample powerpoint presentations and Dr. Anderson's CV are also available.

Audiology Information

Here is an example of a blank audiogram. It shows where different sounds fall related to their decibal level (loudness) and their frequency (high and low pitch.)


The count-the-dots audiogram is now commonly used to explain to patients, for example, why they can hear reasonably well in quiet but their severe loss of audibility for high-frequency sounds creates a difficulty understanding speech in noisy surroundings: In noise, they can't hear many of the low-frequency speech sounds—which they normally depend upon—because those cues are now covered up with (technically, masked by) noise, and they can't make up the difference with high-frequency speech cues because they can't hear them.