Abstract: A hearing aid using a printed circuit board (PCB) is provided, which minimizes internal wires since components of the hearing aid are disposed on the PCB. In the hearing aid using a PCB, hearing aid components can be automatically disposed and soldered on the PCB, and through this the total process time, including manufacturing time, can be substantially reduced.

Abstract: A digital hearing aid enhancing a directional performance for a patient who suffers from sole-ear hearing impairments is provided, in which the digital hearing aid cell inserted into one healthy ear is electrically connected with another digital hearing aid cell called an ear cell including a microphone worn in the other troubled ear, via an external electric wire. Two digital hearing aid cells are connected with each other via signal, power, and ground wires to thereby adjust a time delay parameter and thus make a time delay effect between the two microphones, so that a wearer who wears the digital hearing aid can better hear sound which comes from the side opposing the healthy ear, that is, from the troubled ear side.

Abstract: A hearing aid using a printed circuit board (PCB) is provided which minimizes internal wires since components of the hearing aid are disposed on the PCB. Since individual soldering of amplifier terminals and components of the hearing aid in an existing hearing aid faceplate manufacturing process which consumes the longest time can be automatically performed on the PCB in which the hearing aid components are automatically soldered and disposed, a total process time can be remarkably shortened.

Abstract: A digital hearing aid enhancing a directional performance for a patient who suffers from sole-ear hearing impairments is provided, in which the digital hearing aid cell inserted into one healthy ear is electrically connected with another digital hearing aid cell called an ear cell including a microphone worn in the other troubled ear, via an external electric wire. Two digital hearing aid cells are connected with each other via signal, power, and ground wires to thereby adjust a time delay parameter and thus make a time delay effect between the two microphones, so that a wearer who wears the digital hearing aid can better hear sound which comes from the side opposing the healthy ear, that is, from the troubled ear side.