Stephen Court and Alan Parson's Sound Check CD has become a widespread reference and test CD and it is now joined by Sound Check 2. The new CD contains all the original Sound Check tracks for audio assessment and adds some unique operatic vocal and music tracks, bringing the total number of tracks up to 99.
The double CD case has a built in microphone and sound level meter to provide an instant system response analysis.
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Sound Check Response AnalyserConventional spectrum analysis is used to measure a system's frequency response and consists of a pink noise generator covering the entire audio spectrum with a third octave filter which sweeps from 20Hz to 29kHz. The Sound Check response analyser uses individually recorded third octave bands on CD which are read by an integral sound pressure level meter calibrated in 3dB steps from -15dB to +12dB with a central green 0dB reference indication. This forms a quick and simple method of ascertaining frequency response where the clinical accuracy of expensive laboratory equipment is not required. Most sound level meters are "weighted", or have a response curve tailored to approximate the human ear's response. The Sound Check analyser uses an electret capacitor omnidirectional microphone with manufacturer's response of 20Hz - 20kHz +-2dB. Therefore it is essentially flat allowing for the deficiencies in LED type meters. As "C" weighting is usually used for measuring music, Sound Check's meter is calibrated to read approximately 80dBC at the 0dB reference point. The third octave bands are warbled (modulated) to eliminate room standing waves which could cause false readings and the meter is averaged to provide steadier readings at low frequencies. |
Further reading:
Price of The Sound Check Spectrum Analyser with Sound Check 2 CD
(including packing and postage world-wide):
Pounds Sterling 76.00
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