the word with the mechanism for causing the sound or a sign in a particular sign language. At the slower reading rates (100–300 words per minute), subvocalizing may improve comprehension. Subvocalizing or actual vocalizing can indeed be of great help when one wants to learn a passage verbatim. This is because the person is repeating the information in an auditory way, as well as seeing the piece on the paper. Auditory imagery The definition of auditory imagery is analogous to definitions used in other modalities of imagery (such as visual, auditory and olfactory imagery) in that it is, according to Intons-Peterson (1992), "the introspective persistence of an auditory experience, including one constructed from components drawn from long-term memory, in the absence of direct sensory instigation of that experience.". Auditory imagery is often but not necessarily influenced by subvocalization, and has ties to the rehearsal process of working memory. The conception of working memory relies on a relationship between the "inner ear" and the "inner voice" (subvocalization), and this memory system is posited to be at the basis of auditory imagery. Subvocalization and the phonological store work in partnership in many auditory imagery tasks. The extent to which an auditory image can influence detection, encoding and recall of a stimulus through its relationships to perception and memory has been documented. It has been suggested that auditory imagery may slow the decay of memory for pitch, as demonstrated by T. A. Keller, Cowan, and Saults (1995) who demonstrated that the prevention of rehearsal resulted in decreased memory performance for pitch comparison tasks through the introduction of distracting and competing stimuli. It has also been reported that auditory imagery for verbal material is impaired when subvocalization is blocked. These findings suggest that subvocalization is common to both auditory imagery and rehearsal. In objection to a subvocalization mechanism basis for auditory imagery is in the fact that a significant amount of auditory imagery does not involve speech or stimuli similar to speech, such as music and environmental sounds. However, to combat this point, it has been suggested that rehearsal of non-speech sounds can indeed be carried out by the phonological mechanisms previously mentioned, even if the creation of nonspeech sounds within this mechanism is not possible. Role in speech There are two general types of individuals when it comes to subvocalization. There are Low-Vocalizers and High-Vocalizers. Using electromyography to record the muscle action potential