mürasummutusega

Mürasummutus, also known as noise cancellation or noise reduction, refers to a technology or method used to decrease or eliminate unwanted sound, often referred to as noise. This can be achieved through various techniques, broadly categorized into passive and active methods.

Passive noise cancellation works by physically blocking sound waves. This is typically done through the use of sound-insulating materials. Examples include thick walls, double-glazed windows, earplugs, and noise-canceling headphones that rely on a tight seal and dense materials to block external sounds. The effectiveness of passive noise cancellation depends on the material's density, mass, and how well it seals the space.

Active noise cancellation, on the other hand, uses electronics to reduce sound. This is particularly effective for low-frequency, constant noises such as airplane engines or air conditioners. It works by producing an "anti-noise" sound wave that is the inverse of the unwanted sound. When the original sound wave and the anti-noise wave meet, they cancel each other out, resulting in a reduction of perceived noise. This is commonly implemented in noise-canceling headphones and some vehicle cabins.

The application of mürasummutus spans numerous fields, including consumer electronics, automotive engineering, architectural acoustics, and industrial settings, all aiming to improve comfort, reduce distractions, and protect hearing.