A shoulder-mounted, cable-free noise dose meter that simultaneously measures all parameters required by Noise at Work 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.
Type 4448 is available in an A and B version. The advanced Noise Dose Meter Type 4448-B simultaneously measures LAeq and LCeq, so that by using the Noise Reduction Rating (NNR), Single Number Rating (SNR) and/or High, Middle, Low (HML) rating method, appropriate hearing protection can be selected directly from the measured data.