Software: Why is the internal dosimetry level higher than the external level in Peak?


Occasionally individual headset noise data may appear confusing in Peak. The following image is an example of where internal dosimetry values can be higher than the external values.



There are two scenarios that can lead to the internal dosimetry exceeding the internal level:



The environment is quieter than the device volume

If the environmental (external) noise level is below 80dB(A) and the headset is on volume level high, then the internal noise level reading is likely to be higher than the external noise level.This is because the internal speaker is playing at the same level as the input to the external microphone (see red line on diagram below) and the reverb inside the headset can put the internal level slightly above the external.


The user may not be wearing the headset correctly

The internal dosimetry data isn't reliable when the headset is ‘off ear’ (on the helmet). The reason being the calibration of the internal microphone is adjusted to account for having an ear in the cavity. If there is not a good seal between the ear cushions and the users head, the passive attenuation of the headset will not be effective, and the reverb in the earcup may cause the internal level to exceed the external.



Please see our volume table below for more information:



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