The
Low whistle is a vertical, end blown fipple flute with six holes.
It is similar in construction to a tin/penny whistle but is much
larger, being anywhere between 16 to over 28 inches in length,
and can be cylindrical or conical in shape. They are most
commonly made from aluminum, but can be made from brass, wood, various
types of plastics and even silver. General consensus classifies
any whistle tuned to or below the key of "G" as a "Low" whistle (There
are a few who consider an "A" to be a Low whistle as well).
Others have attempted to organize the different keys of whistles
into families (similar to recorders), such as bass, tenor and alto,
however, there is no standardization between makers on these
classifications.
A Low D whistle (bottom) next to a standard, or High D whistle (top) (whistles made by Shaw)