This International Standard specifies the auditory signals used as a means to communicate information as feedback of operation or the condition of products when a user, even a person with visual impairment or an older person with impairments of vision and hearing, uses a consumer product. It does not specify fire alarm sounds, gas leak alarm sounds, or crime prevention alarm sounds, which are determined by other laws and regulations, nor does it specify electronic chimes, voice guides, and other sounds peculiar to communication instruments such as telephones. It is applicable to auditory signals of a fixed frequency used in general applications (also called beep sounds). NOTE It is also recommended that this document be used when variable frequency sounds or melodic sounds are used.