Tiny engineering - Headphones

Weiyu Li


When we are walking in the streets, we can see some cool boys or girls wearing the headphones, some of them are in-ear earphones, some of them are headsets. In fact, the earphones are not so simple, the companies try to make the good effect of listening, as a result, the engineering in the earphones are important.

 

Headphones could reduce the noise from outside the environment which constructed from the ear and the headphones. To cancel the lower-frequency portions of the noise, noise-cancelling headphones use active noise control. They incorporate a microphone that measures ambient sound, generate a waveform that is the exact negative of the ambient sound, and mix it with any audio signal the listener desires. Also, the headsets could cancel the noise because of the totally ear-covering. 

Hi-Fi isn't the name of the certain headphones but the quality of the songs. Some headphones might have good quality, they may got low by the reason of the quality of songs. Hi-fi reproduction is a term used by home stereo listeners, audiophiles and home audio enthusiasts to refer to high-quality reproduction of sound to distinguish it from the lower quality sound produced by inexpensive audio equipment, or the inferior quality of sound reproduction that can be heard in recordings made until the late 1940s.Ideally, high-fidelity equipment has inaudible noise and distortion, and a flat (neutral, uncolored) frequency response within the intended frequency range.

resourse of noise reducing headphones

resourse of Hi-Fi