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2019年10月18日 · ANC(Active Noise Control)又称为主动噪声控制，常应用在耳机降噪中， 原理 ：通过降噪系统产生与外界噪音相等的 反向声波 ，将噪声中和，从而实现降噪的效果，
Active noise control (ANC), also known as noise cancellation (NC), or active noise reduction (ANR), is a method for reducing unwanted sound by the addition of a second sound specifically designed to cancel the first.
2019年10月18日 · 主动噪声控制 (Active Noise Control, ANC)理论及Matlab代码实现 - 凌逆战 - 博客园. 目录. 声波相消理论. ANC系统基本结构. 前馈型与反馈型ANC系统. 单通道与多通道ANC系统. 宽带与窄带ANC系统. ANC算法. LMS算法. 次级通道在线辨识. 次级通道离线辨识. FM 问题及非平稳. 本章小结. 参考文献. 声波相消理论. 当两列声波同时在同一媒质中传播并在某处相遇时，任意点上的振动将是二者引起振动的叠加，该现象被称为 声波干涉 。 若两列声波具有 相同频率 及 固定相位差 ，当其传播到同一位置时，若出现 同相振动 则会产生 相长干涉 ，若出现 反相振动 则会出现 相消干涉 。
Abstract: Active noise control (ANC) is achieved by introducing a cancelling "antinoise" wave through an appropriate array of secondary sources. These secondary sources are interconnected through an electronic system using a specific signal processing algorithm for the particular cancellation scheme.
Abstract: Active noise control exploits the long wavelengths associated with low frequency sound. It works on the principle of destructive interference between the sound fields generated by the original primary sound source and that due to other secondary sources, acoustic outputs of which can be controlled.
2021年6月1日 · Active noise control (ANC) is an effective way for reducing the noise level in electroacoustic or electromechanical systems. Since its first introduction in 1936, this approach has been greatly developed. This paper focuses on discussing the development of ANC techniques over the past decade.
2021年8月1日 · Answer: Active noise control is the generation of an anti-noise using secondary source (s), which destructively interferes with the primary noise source (s) in air. The position of the secondary source (s) with reference to the primary noise is critical in determining the amount of noise reduction.
2023年4月3日 · Active noise control (ANC) is a method to reduce unwanted noise by generating opposite-phase sound. ANC can be divided into local and global ANC methods according to...
Active noise control (ANC) is an effective way for reducing the noise level in electroacoustic or electromechanical systems. Since its first introduction in 1936, this approach has been greatly developed. This paper focuses on discussing the development of ANC techniques over the past decade.
Active noise control - the reduction of noise by generating an acoustic signal that actively interferes with the noise - has become an active area of basic research and engineering applications.
