References
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- Dyrlund O, Bisgaard N. Acoustic feedback margin improvements in hearing instruments using a prototype DFS (digital feedback suppression) system. Scand Audiol 1991; 20: 49–53
- Dyrlund O, Henningsen LB, Bisgaard N, Jensen JH. Digital feedback suppression (DFS). Characterization of feedback-margin improvements in a DFS hearing instrument. Scand Audiol 1994; 23: 135–8