Tinnitus activity in the limbic system and autonomic nervous system, thus increasing tinnitus awareness and annoyance. There are two types of tinnitus: "subjective tinnitus" and "objective tinnitus". Tinnitus is usually subjective, meaning that there is no sound detectable by other means. Subjective tinnitus has also been called "tinnitus aurium", "non-auditory" or "non-vibratory" tinnitus. In very rare cases tinnitus can be heard by someone else using a stethoscope, and in less rare – but still uncommon – cases it can be measured as a spontaneous otoacoustic emission (SOAE) in the ear canal. In such cases it is objective tinnitus, also called "pseudo-tinnitus"
Body part as an object distinguished by how they are carried out. For example, BPO mime gestures are differentiated by the insertion of a body part to help represent the object itself. Conversely, Imaginary object (IO) pantomimes occur when an individual mimes the use of an object as though the object were actually present. Using a similar example to above, an IO pantomime occurs as an individual pretends to brush their teeth by positioning the hand and fingers as though the toothbrush were actually in their hand: they are pretending the object is actually present. BPO, and BPO measures particularly, are notable in that they