Personal Noise Dose Meters

Personal Noise Dose Meter – Type 4448

Type 4448


A shoulder-mounted, cable-free noise dose meter that simultaneously measures all parameters required by occupational noise standards. Simple two-button operation, an informative LCD display and an auto-calibration function make this unit very easy to use. The built-in memory and rechargeable battery provide several working days of measurement.


  • Assessment of noise exposure at work
  • Occupational noise evaluation
  • Daily ‘noise watchdog’
  • Selection of hearing protection


  • 180 hours logging storage: Simultaneous LAeq, LZpeak and LCpeak and other parameters at 1 minute intervals
  • Peak counting (135, 137 and 140 dB level exceedance)
  • Pre-set measurement time up to 12 hours
  • LCD display for measurement review on instrument, battery and memory status
  • Keys and display lock function
  • LED warning alarm for dangerous sound level
  • Rechargeable NiMH battery giving 28 hours of operation time