Tin, lead and their alloys, due to their low melting temperatures and wide availability, are the most commonly used solder materials. In fact, lead has been used as a soldering metal for water pipes (also made of lead) even in Roman times, hence the scientific name for lead, Plumbum. Mechanical Properties.
hearing impairment - impairment of the sense of hearing. hearing disorder. disability, disablement, handicap, impairment - the condition of being unable to perform as a consequence of physical or mental unfitness; reading disability; hearing impairment. deafness, hearing loss - partial or complete loss of hearing.
Introduction: An auditory neuropathy (AN)is a hearing loss caused by damage to the auditory portion of the eighth nerve, which is located between the inner ear (cochlea) and the brainstem. (see item 6 on figure to the right).uditory neuropathy may also affect vestibular function (Sheykholeslami et al. 2000). Some of these patients may actually have a different disorder (loss of inner hair cells - -due to logical errors in the diagnostic process -- see below).