Background: Art of Noise (also The Art of Noise) were an English avant-garde synth-pop group formed in early 1983 by engineer/producer Gary Langan and programmer J. J. Jeczalik, along with arranger Anne Dudley, producer Trevor Horn and music journalist Paul Morley. The group had international Top 20 hits with "Kiss" and the instrumental "Peter Gunn", which won a 1986 Grammy Award. The group's mostly instrumental compositions were novel melodic sound collages based on digital sampler technology, which was new at the time. Inspired by turn-of-the-20th-century revolutions in music, the Art of Noise were initially packaged as a faceless anti- or non-group, blurring the distinction between the art and its creators.
Context: By 1987, the band's membership was down to just Jeczalik and Dudley. That year saw the release of their album In No Sense? Nonsense!  The album featured Jeczalik's most advanced rhythmic collages to date, plus lush string arrangements, pieces for boys' choir, and keyboard melodies from Dudley. It did not produce any hits, although their record label made efforts to push remixes of "Dragnet" into the dance clubs and the single reached No. 60 on the UK charts.  In 1987, The Art of Noise provided the score for two movies, Hiding Out and Dragnet, and one particular movement was used in both films. Their brass-based connecting passage between sections from the original Dragnet television show's theme song was used as incidental music during a dramatic scene--an armed chase through the rafters of a gymnasium--near the end of Hiding Out.  In 1988, a one-off collaboration with singer Tom Jones (a cover of Prince's "Kiss"--a staple in Jones' stage shows) renewed the public's interest in the Art of Noise and provided the group's biggest hit in the mainstream. The track appeared on several albums by Jones, and China Records included the song on the greatest hits compilation The Best of The Art of Noise, the first edition of which also contained tracks licensed from ZTT.  The follow-up album, Below the Waste, failed to achieve much success upon its release in 1989. While it did spawn the memorable single "Yebo!" (featuring the unique vocals of Zulu performers Mahlathini and the Mahotella Queens). Both cassette and CD versions include two bonus tracks in the form of "Robinson Crusoe", and the "James Bond Theme".  In 1990, Dudley and Jeczalik declared that the Art of Noise had officially disbanded.
Question: Who was in the band during this period?. Whats the answer?
the band's membership was down to just Jeczalik and Dudley.