Patent ID: 8462957

Claim:
A hearing aid, comprising: a main body case; a microphone disposed inside the main body case and configured to convert sound into an electrical signal; a processor disposed inside the main body case; a first volume adjuster having a variable resistor and a control component, the control component being disposed so as to be exposed on an outside of the main body case and configured to set a resistance value of the variable resistor; a receiver configured to convert the electrical signal into sound; and a memory, wherein the processor includes: an amplifier configured to amplify the electrical signal from the microphone; a second volume adjuster configured to set a degree of amplification by the amplifier according to the resistance value of the variable resistor of the first volume adjuster; and a controller configured to control the amplifier and the second volume adjuster, wherein the memory is connected to the controller and configured to store a specific value for the degree of amplification by the amplifier, the specific value being fixed, wherein the controller detects the resistance value of the variable resistor of the first volume adjuster, wherein the controller determines whether or not the resistance value has exceeded a specific threshold, so as to determine whether or not there is a disconnection between the variable resistor of the first volume adjuster and the second volume adjuster, and wherein, when the controller determines that the resistance value has exceeded the specific threshold and that there is the disconnection between the variable resistor of the first volume adjuster and the second volume adjuster, the controller acquires the specific value from the memory and sets the degree of amplification by the amplifier to the specific value.