Beschreibung

The GenRad 1988 Precision Integrating Sound-Level Meter and Analyzer offers a combination of power, flexibi lity, and ease·ol·use Ihat is unmatched by any other inlegrating meter. Basically, an integrating sound·level meter enables you to „capture“ and „add up“ the contribul ions of noise sources by averaging their levels over an ex tended period of time. Convenlional sound·level meters, in principle, perform similar averaging, but Ihe 1988 does so far more automatically and precisely.
The primary integraling parameters computed by Ihe 1988 are the 4.0 (eq uivalenl continuous level, or average evel) and Ihe SEL (I he sound exposure level). The 1988 also provides conventional sound-level readings. It incorporates 10 octave band filters, with center frequencies from 31.5 Hz 10 16.0 kHz. It contains A. B, and C weighting networks. as well as a flat (no weighting) nel· work, over a 5·Hz to 20·kHz range. Four detector integrator characteristics provide a selection of fast, slow, peak, or impulse response in the conti nuous mode. In the integ raling mode. fast response is normal· Iy used, but slow or impulse may be se lected if desired. The 1988 provides di recl readings for levels ranging from 30 to 140 dB (150·dB peak). Levels as low as 10 dB can be measured with an optional 1″ microphone.