Crystal Sound is a sound

Sound

Sound is a mechanical wave that is an oscillation of pressure transmitted through a solid, liquid, or gas, composed of frequencies within the range of hearing and of a level sufficiently strong to be heard, or the sensation stimulated in organs of hearing by such vibrations.-Propagation of...

 between the southern part of the Biscoe Islands

Biscoe Islands

Biscoe Islands is a series of islands, of which the principal ones are Renaud, Rabot, Lavoisier and Watkins, lying parallel to the W coast of Graham Land and extending some in a NE–SW direction...

 and the coast of Graham Land

Graham Land

Graham Land is that portion of the Antarctic Peninsula which lies north of a line joining Cape Jeremy and Cape Agassiz. This description of Graham Land is consistent with the 1964 agreement between the British Antarctic Place-names Committee and the US Advisory Committee on Antarctic Names, in...

; northern limit Cape Evensen

Cape Evensen

Cape Evensen is a cape forming the north side of the entrance to Auvert Bay, on the west coast of Graham Land. Discovered by the French Antarctic Expedition, 1903–05, and named by Charcot for Captain C.J. Evensen of the Hertha, who explored along the west coast of Antarctic Peninsula in 1893....

 to Cape Leblond

Cape Leblond

Cape Leblond is a cape forming the north end of Lavoisier Island, in the Biscoe Islands. Charted by the French Antarctic Expedition under Charcot, 1908–10, and named by him for the President of the Norman Geographical Society at Rouen....

, southern limit Holdfast Point

Holdfast Point

Holdfast Point is a point at the east side of Lallemand Fjord, about 12 nautical miles southwest of Cape Rey, Graham Land. Mapped from air photos taken by Falkland Islands and Dependencies Aerial Survey Expedition...

, Roux Island

Roux Island

Roux Island is an island 2 nautical miles long, lying 0.5 nautical miles north of Arrowsmith Peninsula at the west side of the entrance to Lallemand Fjord, off the west coast of Graham Land. Discovered by the French Antarctic Expedition under Charcot, 1908–10, who named it for Jules Charles-Roux....

, Liard Island

Liard Island

Liard Island is a mountainous island, long, wide and rising to , situated in the north-central portion of Hanusse Bay, off the west coast of Graham Land, Antarctica...

 and Sillard Islands

Sillard Islands

Sillard Islands is a group of small ice-covered islands lying close to Cape Mascart, the northeast extremity of Adelaide Island. Discovered by the French Antarctic Expedition, 1908–10, under Charcot, and named for Director Sillard of the French Montevideo Co., Montevideo, Uruguay, whose company...

. So named by United Kingdom Antarctic Place-Names Committee (UK-APC) in 1960 because many features in the sound are named for men who have undertaken research on the structure of ice crystals.