Db spl to db hl conversion chart
Jeep patriot ptu noise
The differences between dB HL and dB SPL, arise from isophonic curves. Frequency [Hz]. Table 3: The examples of equivalent time-intensity levels referred to the action levels according to the Directive 2003/10/EC. Table 4: World Health Organisation Grades of Hearing Impairement (WHO, 2008).
mal-hearing threshold (0 dB nHL), when the signals are presented with alternating polarity at a rate of 20/s. The peak-to-peak equivalent sound pressure level, dB peSPL, is defined in fig. 1. Thus the stimulus levels of the tone bursts, and the obtained thresholds, can be given equally well in either dB peSPL or dB nHL.