ABSTRACT
If the high and low frequencies are equal in level on-axis, then it should be obvious that in the room as a whole, there will be more low frequency energy, because at no point do the high frequency levels exceed the low frequency levels. Conversely, the lows are present in many places at much higher levels than the highs. In fact, the areas of the high and low frequency patterns in Figure 11.5 give a reasonable idea of the relative proportions of the radiated power in each frequency band. Nevertheless, in an anechoic chamber, in an arc of ±15° across the frontal axis, a highly uniform response can be achieved.
