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.
In some cases, auditory neuropathy spectrum disorder causes only mild hearing difficulties and is only a problem in noisy situations. In the majority of cases, however, it leads to significant hearing loss.ead More About Auditory Neuropathy Spectrum Disorder. Auditory neuropathy spectrum disorder (ANSD) is a broad term that describes any of a variety of problems involving âmisfiringsâ of the auditory (hearing) nerve, or problems affecting the nerveâs connection with the cochlea (inner ear).