Dental fricatives

Dental fricatives are produced by the tip of the tongue being placed against or behind the upper teeth so that audible friction is caused when the air pressure builds up. The dental fricatives come as a pair, one Fortis, the other Lenis. The fortis fricative is never voiced, the lenis is commonly devoiced when not surrounded by other voiced sounds. Devoicing is therefore normal in the end position of a word.
There is no Norwegian counterpart, and Norwegians tend to replace the two sounds by the Norwegian sounds that seem closest. These are the plosives /t/ and /d/. As these exist in SBE as well, mispronunciation of dental fricatives may cause words to be misinterpreted.