There are characteristics unique to cetaceans. The first one is the posterior process that is enlarged from the posterior crus, forming the primary bullar articulation to the basicranium. The second defining characteristic is that the sigmoid process is enlarged. The third characteristic is a conical apophysis that is modified from the ectotympanic ring. Then there is the conical tympani ligament, derived from the tympanic membrane. Lastly, the involucrum formed from the pachyosteosclerosis of the bulla.  These unique traits evolved overtime, from the terrestrial Pakicetidae to the crown whales today.
The equalizer is definitely the most important piece of equipment in your audio rack! Most transceivers do an excellent
job of passing all the midrange frequencies between 300Hz ~ usually with an added dominance between 500Hz ~ 800Hz. Unfortunately, most
stock transmitters roll-off the bass frequencies below about 150Hz and down, as well as the high frequencies above about and up. So, we
need to do basically three things:
* Reduce the Midrange
* Increase the Bass
* Increase the Treble
Taking a look once again at GRAPH 1 and GRAPH 2 above, you can see what an EQ can accomplish when set up. Below is a graphical representation of what EQing I had to implement in order to get some flatness out of my Kenwood TS-850S/DSP-100 after passing through its . and DSP filtering.