Open AccessA hands-on approach to demonstrating active noise cancelling
Author(s) -
Philip Coandă,
Mihai Avram,
Daniel Comeagă
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/997/1/012040
Subject(s) - active noise control , headphones , noise (video) , acoustics , engineering , computer science , electronic engineering , telecommunications , noise reduction , electrical engineering , physics , artificial intelligence , image (mathematics)
As noise pollution has become an increasingly major factor in the quality of urban life, noise cancelling methods started to be a relevant option for everyday life. Starting from the first active noise cancelling headphones build for aircraft industry in order to facilitate communication between pilots, in the last decade, active noise cancelling products have become more and more relevant. Factories, military and lately, civil usage of active noise cancelling technology transformed this industry and made it widely available. The purpose of this paper is to demonstrate a practical way of active noise cancelling using LabVIEW. Two sound waves are guided through a cylindrical conduit and at a given position, by modifying the phase and amplitudes between the two signals, an amplitude close to zero is expected.