Tin whistle all the holes closed, the whistle generates its lowest note, the tonic of a major scale. Successively opening holes from the bottom upward produces the rest of the notes of the scale in sequence: with the lowest hole open it generates the second, with the lowest two holes open, it produces the third and so on. With all six holes open, it produces the seventh. As with a number of woodwind instruments, the tin whistle's second and higher registers are achieved by increasing the air velocity into the ducted flue windway. On a transverse flute this is generally done by
Signature whistle dolphin’s signature whistle usually fully develops within the first year of life, and rarely changes throughout adulthood. A calf develops its own signature whistle based on the signature whistle of an adult in its pod. The calf does not copy the whistle, instead it uses it as a model. Calves tend to model their signature whistles after those of adult dolphins who they do not spend much time with. Vocal learning is essential in a dolphin calf’s signature whistle development. It is an animal’s ability to imitate vocalizations from other animals of the same species, and eventually produce its own