Patent ID: 8503696
Filing Date: 2013-08-06
Classification: H03G,H04S

Abstract:
1. An electronic apparatus having an adjustment mode and a normal operating mode, comprising: a control button for a user to provide a first command to select a first one of a plurality of tones corresponding to different frequency bands, wherein said plurality of tones are selected in a predefined sequential manner, such that if another occurrence of said first command is provided immediately after said first command, a second tone, which is the immediately next tone in sequence, is selected, and said control button also allows a user to provide a second command, such that if a second command is received immediately after said first command, a third tone, which is a tone in sequence after said second tone, is selected; generating means for generating said first and third tones respectively responsive to said first and second commands in said adjustment mode; processing means for placing said electronic apparatus in one of said adjustment mode and said normal operating mode responsive to a mode signal in said adjustment mode and for enabling a user to adjust a first volume level of said first tone and a second volume level of said third tone; memory means for storing said first and second volume levels respectively for first and third frequency bands respectively corresponding to said first and third tones; and volume control means having first and second filters for receiving signals from said generating means in said adjustment mode or from a sound player in said normal operating mode, said volume control means respectively applying said first and second volume levels stored in said memory means to output signals from said first and second filters, wherein said electronic apparatus does not provide a visual output representative of the frequency bands.