Definition of a Hearing Aid

• Ultra miniature electro-acoustical device that is always too large
• Must amplify sound perfectly, but bring in no noise
• Must operate without failure:
• In a dark obscure cavity often impregnated with a sticky substance having the consistency of peanut butter
• In seas of perspiration, water, and suds
• After being put through your washer and dryer
• After withstanding a thorough chewing by your dog
• It is a product that one puts off buying for years after it is needed, but can’t do without for 1 day when it has to be serviced