I’m a part-time sound tech at Everyday Joe’s Coffee House. So over the past 3 years or so, I’ve been learning how to mix live sound. I just started reading Mixing Audio by Roey Izhaki. In Chapter 2, he is talking about a study done at Bell Labs in 1933, where they measured what frequencies people think are loudest. Basically, we more readily hear the mid-range frequencies, and the music has to be louder for us to discern the highs and lows.
“The graph also teaches us that our frequency perception has a bump around 3.5kHz – a fact contributed to the resonance frequency of our ear canal. Some claim that it is not by chance that within this bump falls the center frequency of a baby’s cry.”
Now that is just cool.