What are the primary purposes of speech threshold testing?
a. To cross-check other results, inform pure tone and speech audiometry testing procedures, and determine minimum level at which speech can be detected
b. To determine degree, type, and configuration of hearing loss, and to inform aural rehabilitation procedures
c. To make sure patient understands instructions and can generalize them to other tests, and to quickly rule out hearing loss in difficult to test populations
d. To assess how well the patient may perform in real world settings, and to predict hearing aid outcomes