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///Motorsport

Bruel & Kjaer 2144

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Real-time Frequency Analyzers Types 2143 and 2144, 2148/7667 are portable analyzers for acoustics, electroacoustics and vibration measurements in the field and in the laboratory. Type 2143 offers dual-channel autospectra while Types 2144 and 2148/7667 also offer sound intensity and cross spectrum analysis. The analyzers feature real-time digital filtering across a wide frequency range. Real-time operation is important for the analysis of non-stationary signals such as decays and impulsive events. The analyzers are operated by means of menus, and a system of on-screen help pages enables the full potential of the analyzers to be used in the field. The large internal non-volatile memory and back-up disk storage facilities make the analyzers useful data-gathering devices with further control and data-processing possibilities via their IEEE –488 and RS–232 interfaces.
    USES:
  • Sound intensity measurements to IEC1043
  • Constant-percentage bandwidth frequency analysis of sound and vibration signals in real-time
  • Noise source location and source ranking of complicated structures (2144, 2148/7667)
  • Environmental noise measurements. Includes Taktmaximal
  • Building acoustics testing: sound transmission, absorption, reverberation time
  • Automotive acoustic and vibration testing
  • In situ sound power measurements (2144, 2148/ 7667)
    FEATURES:
  • IEC651/804 Type 1 accuracy (with suitable microphone)
  • Weight with batteries <10 kg (< 22lbs)
  • Battery life-time > 4 hrs continuous use
  • Inputs: microphone (preamplifier), sound intensity probe (2144, 2148/7667), accelerometer (charge) and direct
  • Real-time frequency analysis up to 22.4 kHz (single channel), 11.2 kHz (dual channel)
  • 80 dB dynamic range, autocalibration
  • Fractional-octave digital filters
  • Storage rate: 1000 spectra/second (single channel), 500 spectra/second (dual channel)
  • Large internal non-volatile memory
  • PC/MS–DOS compatible 3 1 /22 disk-drive for back-up storage of spectra and set-ups
  • IEEE–488 and RS–232 interfaces
  • Zwicker Loudness and FFT application programs available
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