The Drøbak Sound ( Norwegian: Drøbaksundet) is a

sound In physics, sound is a vibration that propagates as an acoustic wave through a transmission medium such as a gas, liquid or solid. In human physiology and psychology, sound is the ''reception'' of such waves and their ''perception'' by the br ...

at the

Oslofjord The Oslofjord (, ; ) is an inlet in southeastern Norway. The fjord begins at the small village of Bonn in Frogn, Frogn Municipality and stretching northwards to the city of Oslo, and then curving to the east and then south again. It then flows s ...

narrows between

Drøbak Drøbak is a town and the centre of the municipality of Frogn, in Akershus county, Norway. The city is located along the Oslofjord, and has 13,409 inhabitants. History Drøbak and Frogn was established as a parish on its own through a royal d ...

and

Hurum Hurum was a municipality in Buskerud county, Norway. As of 1 January 2020 Hurum has merged with the municipalities of Røyken and Asker to form the new Asker Municipality located in the newly formed Viken county. The administrative centre of th ...

. "Outer Oslofjord" is a term for the fjord south of the Drøbak Sound until it meets the

Skagerrak The Skagerrak (; , , ) is a strait running between the North Jutlandic Island of Denmark, the east coast of Norway and the west coast of Sweden, connecting the North Sea and the Kattegat sea. The Skagerrak contains some of the busiest shipping ...

. "Inner Oslofjord" is a term for the rest of the

fjord In physical geography, a fjord (also spelled fiord in New Zealand English; ) is a long, narrow sea inlet with steep sides or cliffs, created by a glacier. Fjords exist on the coasts of Antarctica, the Arctic, and surrounding landmasses of the n ...

, starting at the Drøbak Sound and extending northwards towards

Oslo Oslo ( or ; ) is the capital and most populous city of Norway. It constitutes both a county and a municipality. The municipality of Oslo had a population of in 2022, while the city's greater urban area had a population of 1,064,235 in 2022 ...

, where the fjord turns southwards and continues as the Bunne Fjord. The Drøbak Sound was historically guarded by the Oscarsborg Fortress. During the German invasion of Norway on 9 April 1940, the German cruiser was sunk by the fortress.Oscarsborg Fortress, Official website
Oscarsborg Fortress has been converted into a museum and hotel, and there is a ferry to the fortress from Drøbak. The subsea

Oslofjord Tunnel The Oslofjord Tunnel () is a subsea road tunnel which traverses the Oslofjord, connecting Hurum and Frogn in Norway. Carrying three lanes, the long tunnel reaches a depth of below mean sea level. The tunnel has a maximum gradient of seven per ...

at the Norwegian National Road 23 runs underneath the sound and connects the east and west sides of the fjord.

References

{{DEFAULTSORT:Drobak Sound Sounds of Norway Frogn Hurum Oslofjord

See also

References