Hearing aids can be used as an alternative to overcome some types of hearing loss. To understand how hearing aids work we need to know the components that makeup and the working principle. By knowing how hearing aids work, we will understand the health value and reduce the bad effects of noise. Hearing aids work to help people with hearing loss from the various medical side.
The conductive hearing loss does not always require hearing aids as it can be medically cured. Hearing aids work to help overcome this type of hearing loss in a few cases. Medical rarely able to overcome the sufferer Sensorineural hearing loss. Hearing aids work to help this type of patient. Patients with Mixed Hearing Loss also need help from hearing aids.
In the previous article, we already know that hearing loss can be caused by noise received ear long time. ( See How to Prevent Hearing Loss in Children?) Cases that often occur in adolescence is the result of adolescents like to play online games with a loud voice for example and the impact of low-quality equipment. At this stage, we will learn how the hearing aid works to help people with hearing loss.
Hearing aids work with the following working principles:
The sound source raises the voice frequency that is the input received by the mic. The sound frequency is changed from sound signal to electrical signal and the process is continued in Amplifier. Amplifiers process the electrical signals by filtering out the sound of conversations and noise. This amplifier will clarify the speech sound signals and minimize the noise signal.
Signals that have been processed by the amplifier will continue to be processed by the receiver. The receiver converts the electrical signal into an enlarged and clean sound. The receiver is the earphone-shaped speaker as the output. The receiver’s sound is the same as the sound source.
In summary, the components of hearing aid include:
The resistor is an inhibiting electronics component with Ohm unit. The receptor element is made from a mixture of carbon or graphite carbon and ceramic.
The capacitor is a component consisting of two metal plates separated by an isolator with a Farad unit. This capacitor receives electrical signals and stores them in relative time. The isolator on this capacitor shows the name of the capacitor.
IC (Integrated Circuit)
IC is a combination of several electronic components in united in the form of chips. IC is made of semiconductor material that is a combination of resistors, capacitors, diodes and integrated transistors.
The potentiometer is a resistor whose resistance value can be changed by rotating the available shaft. Potentiometers are used to control the volume of various audio equipment.
A battery is a device that supplies electrical energy through a chemical process.
The microphone is a transducer that detects voice signals and produces electrical signals. When the microphone receives a sound signal, the sound signal vibrates the membrane as a result of the small wire coil that lies behind the membrane vibrating. The small wire coil is surrounded by a magnetic field created from a small permanent magnet. The movement of small wire coils in the magnetic field will result in the formation of electrical signals.
Speakers or loudspeakers are transducers that convert electrical signals to audio (sound) by vibrating their membrane-shaped components. Speakers carry electrical signals and turn them back into vibrations to create sound waves. The most important elements in the speaker system are the diaphragm and magnet.
A switch is a device to disconnect the power grid or to connect it.
LED (Light Emitting Diode)
LEDs are diode type electronic components capable of emitting light.