The 9th annual MLSP competition: New methods for acoustic classification of multiple simultaneous bird species in a noisy environment. - Forrest Briggs; Yonghong Huang; Raviv Raich; Konstantinos Eftaxias; Zhong Lei; William Cukierski; Sarah Frey Hadley; Adam Hadley; Matthew Betts; Xiaoli Z. Fern; Jed Irvine; Lawrence Neal; et al. (MLSP, 2013)