Sound Part Three: The third part of our acoustical technical notes will discuss frequency weightings and octave bands. Frequency Weightings: Frequency weightings also known as frequency networks and frequency filters, correlate measured sound levels with the subjective human response. The human ear is frequency selective, between 500 Hz and 6 kHz, our ears are very sensitive compared with lower and higher frequencies. The frequency weightings used in sound level meters are often related to the [...]