Aldra in the context of Very low frequency

In geography, a sound is a smaller body of water usually connected to a sea or an ocean. A sound may be an inlet that is deeper than a bight and wider than a fjord; or a narrow sea channel or an ocean channel between two land masses, such as a strait; or also a lagoon between a barrier island and the mainland.

Lurøy is a municipality in Nordland county, Norway. It is part of the Helgeland traditional region. The administrative centre of the municipality is located on the island of Onøya. Other villages in Lurøy include Aldra, Haugland, Konsvikosen, Lovund, Lurøy, Sleneset / Solværøyene, Stokkvågen, and Tonnes.

The municipality is located on the coast just south of the Arctic Circle, on the western edge of the Saltfjellet mountain range. The Lurøygården (Lurøy Farm) on the island of Lurøya is a more-than-200-year-old renaissance garden with old plants, a pool, and a nearly 20-metre (66 ft) high Copper Beech.

Haugland is a village in Lurøy Municipality in Nordland county, Norway. The village is located on the mainland coast, along the Aldersundet strait between the mainland and the island of Aldra. Norwegian County Road 17 passes through the village. Aldersund Church is located in Haugland, and it serves the eastern part of the municipality.