By Scott D. Snyder
Active noise keep an eye on - the aid of noise via producing an acoustic sign that actively interferes with the noise - has develop into an energetic sector of easy study and engineering functions. the purpose of this ebook is to offer all the simple wisdom one wishes for assessing how beneficial lively noise keep an eye on could be for a given challenge after which to supply a few tips for designing, constructing, and tuning an lively noise-control approach. Written for college students who've no past wisdom of acoustics, sign processing, or noise regulate yet who do have an inexpensive snatch of uncomplicated physics and arithmetic, the publication is brief and descriptive. It leaves for extra complicated texts or learn monographs all mathematical information and proofs bearing on vibrations, sign processing and so on. The ebook can hence be utilized in self sufficient examine, in a lecture room with laboratories, or at the side of a equipment for scan or demonstration. subject matters lined contain: simple acoustics; human belief and sound; sound depth and comparable innovations; basics of passive noise-control options; fundamentals of electronic structures; fundamentals of adaptive controllers; and lively noise regulate systems.
Read or Download Active Noise Control Primer PDF
Similar acoustics & sound books
Noise is in every single place and in so much functions which are on the topic of audio and speech, reminiscent of human-machine interfaces, hands-free communications, voice over IP (VoIP), listening to aids, teleconferencing/telepresence/telecollaboration platforms, and such a lot of others, the sign of curiosity (usually speech) that's picked up via a microphone is mostly infected by means of noise.
Figuring out and Crafting the combination grants transparent and systematic equipment for deciding on, comparing, and shaping the creative parts in track and audio recording. The routines all through assist you to improve serious listening and comparing abilities and achieve better keep watch over over the standard of your recordings.
A great studying device for college students and practitioners, this consultant to noise keep an eye on will allow readers to exploit their wisdom to resolve quite a lot of commercial noise keep watch over difficulties. operating from uncomplicated clinical rules, the writer indicates how an figuring out of sound might be utilized to real-world settings, operating via a number of examples intimately and overlaying strong perform in noise regulate for either new and present amenities.
- Fundamentals of Sound and Vibration, Second Edition
- What Is a Problem That We May Solve It?
- Detailing for Acoustics
- Large Scale Systems: Decentralization, Structure Constraints, and Fixed Modes
- Computational Simulation in Architectural and Environmental Acoustics: Methods and Applications of Wave-Based Computation
- Applied Sonochemistry: Uses of Power Ultrasound in Chemistry and Processing
Additional resources for Active Noise Control Primer
That is the only possible way to obtain a repeating shape on a cycle-to-cycle basis. Additional sound sources are not required to produce this shape. Consider, for example, a loudspeaker which is outputting a single frequency. If you place your finger on the loudspeaker you will distort the shape of the sound wave. You haven't introduced additional sound sources, but you have altered the harmonic content of the sound field simply by altering the shape of the periodic waveform. This may all sound like a "mathematical" concept aimed purely at describing the shape of a wave.
Background: Fundamentals of Sound that the frequency content (from the individual sound sources) is driving the shape of the periodic waveform. What is harder to grasp, and what is far, far more common, is for the shape of the waveform to drive the frequency content. In order for a given periodic waveform to exist, it must include multiple harmonics. That is the only possible way to obtain a repeating shape on a cycle-to-cycle basis. Additional sound sources are not required to produce this shape.
Most people would be familiar with the "buzz" produced by a small or low-cost loudspeaker which is driven to its limits by sound with a large "bass" component. This is the generation of high-frequency harmonics. The generation of harmonics and periodic sound fields will take on greater significance after we discuss how human beings perceive sound. Side Story. Have you ever noticed that a train appears to change frequency as it comes toward you and eventually passes you? (Steam or diesel trains that is.
Categories: Acoustics Sound