Titlebook: Software-Based Acoustical Measurements; Federico Miyara Textbook 2017 Springer International Publishing AG 2017 acoustical measurements.al

BATE

Digital Recording,ing an analog/digital converter and recorded in some physical medium. In this chapter we shall introduce the fundamentals of digital audio and digital recording, covering the concepts of sampling, aliasing, digitization, distortion and dithering, D/A and A/D conversion, digital recording devices and

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Digital Audio Editing,op’s hard disk. Often it is necessary to perform some postprocessing on the acquired signal to render it ready for its analysis, such as trimming out irrelevant portions, isolating events of interest, adding comments, etc. This can be done using digital audio editing software. This chapter covers th

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Digital Signal Processing,et a modified version for some purpose or to get useful information. It is here that digital signal processing comes into play. In this chapter we will consider discrete systems, convolution techniques, finite and infinite impulse response, difference equations, frequency response, . transforms, sta

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Testing Digital Recorders,r software to get sophisticated mesaurements such as band spectrum or exceedance levels. However, the accuracy of the results is limited by the performance of the recorder. In this chapter we study the tests to be performed on the recorder to ensure it is suitable for its use as part of a measurment

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防御

Spectrum Analysis, and FFT filters. As a byproduct, several additional techniques such as FFT convolution and FFT correlation are introduced. Finally, the problem of algorithm validation to ensure that the results are compatible with those obtained by standard commercial analyzers is considered.

GAVEL

Testing Digital Recorders, system, including the verification of its frequency response, effect of temperature, self-generated noise, linearity, transient response and uncertainty. Example results for a consumer digital recorder are also provided.