Get A text-book of physics: Sound (Fourth Edition) PDF

Acoustics Sound

By J. H Poynting and J. J. Thomson

Show description

Read Online or Download A text-book of physics: Sound (Fourth Edition) PDF

Similar acoustics & sound books

Download e-book for iPad: Altered Sensations: Rudolph Koenig’s Acoustical Workshop in by David Pantalony

Rudolph Koenig was once one of many extra prolific and vibrant tool makers within the popular nineteenth-century precision software alternate of Paris. starting his occupation as a violin maker, in 1858 the younger Prussian immigrant shifted his abilities in the direction of the turning out to be box of acoustics. Altered Sensations is a portrait of his shiny atelier, a spot of building, trade and scan.

Download PDF by Dennis Baxter: A Practical Guide to Television Sound Engineering

Tv audio engineering is like all different business-you examine at the job--but a growing number of the is counting on a contract economic climate. The mentor is turning into something of the prior. a realistic advisor TO tv SOUND ENGINEERING is a go education reference consultant to technicians and engineers of all degrees.

John Linsley Hood (Auth.)'s Audio Electronics PDF

A survey written for somebody inquisitive about designing, adapting and utilizing electronic and analog audio gear

Additional info for A text-book of physics: Sound (Fourth Edition)

Sample text

Number of control sources and error sensors (increasing the number requires a smaller convergence coefficient). Cancellation path transfer function amplitude (an increased gain in this path requires a reduced convergence coefficient). Time delay in the cancellation path (an increased time delay requires a reduced convergence coefficient). Digital filter length (increasing the length requires reducing the convergence coefficient). Ratio of sampling rate to reference signal frequency (an increased ratio requires a reduced convergence coefficient.

Acoustic feedback can occur in a feedforward active noise control system if a microphone is used to provide the system reference signal and some of the noise generated by the control source reaches the microphone. If the acoustic feedback is small relative to the primary noise signal at the reference microphone location, then one is just restricted in the choice of controlfílter types that may be used (see Chapter 3). If the feedback signal is relatively large (the exact size is system dependent), then the control system may become unstable, regardless of whether an FIR or an IIR filter is used.

For enclosed sound fields, total potential energy, rather than the sum of squared sound pressures at a number of locations may be used as the quantity to be minimised (cost function). For sound radiated by a source outdoors, the cost function may be total radiated sound power. The minimum valué of the cost function is calculated for each control source configuraron tested. The best control source confíguration can then be determined by trial and error or a more sophisticated search procedure such as a genetic algorithm may be used as described by Simpson and Hansen (1996) and Hansen et al.

Download PDF sample

A text-book of physics: Sound (Fourth Edition) by J. H Poynting and J. J. Thomson

by Brian

Rated 4.89 of 5 – based on 27 votes