In this exercise, we will focus on identification of changes in the spectral balance of a sound. In the simplest case we will split the spectral register into high and low frequencies, and identify if either of these areas have been boosted (amplified) or cut (dampened). When we apply a DSP process to a sound, we will in many cases change the spectral balance. For this reason, training to identify changes in spectral balance and spectral composition is of great importance.
The following listening examples use a cutoff frequency of 600 Hz, and use a filter to decrease the energy of the frequency band above (high shelf) or below (low shelf) this cutoff frequency.
Listen to the sound examples and try to determine if the high or low frequencies have been damped, and also try to estimate by how much (e.g. -5dB) they have been damped.