Phoneticians have found it difficult to give a precise definition of the articulatory distinction between these two classes of sounds.
Speech and singing are composed from 3 large classes of sounds: vowels, consonants, and nonspeech.
Phonemes also may be understood in terms of equivalence classes of sounds.
Different classes of sounds (e.g., plosives, fricatives) are associated with different perceptual properties (Fort, Martin, & Peperkamp, 2014; Nielsen & Rendall, 2011).
With the exception of enhanced directionality of impulsive sounds, the proposed method should not alter other classes of sounds (e.g., human speech sounds).
They thus correspond to clear and distinct classes of sounds with different functions and social values.
The sediment layer possesses a generalized exponential type of variation in density and one of the three classes of sound speed profiles, which are constant, k2-linear, or inverse-square variations.
Consequently, a separate set of studies will use adaptation techniques to determine how listeners categorize sounds by their source characteristics, and to assess whether computer-generated prototypical sources - sources, such as bars, tubes, and plates, that define broad classes of sound-producing objects - are classified more rapidly and accurately than non-prototypical sources.
For example, good results have been reported when using Hidden Markov Models (HMM) on rather specific classes of sound effects [7, 8].
In McLoughlin's work, there were in total 50 classes of sound events selected from the RWCP Sound Scene Database, such as the wooden, metal and china impacts, friction sounds, bells, phones ringing, and whistles, and each class included 80 files.
We tested the SVM-based SER with 20 classes of sound events (boiling water, frying fries, making coffee, washing dishes, teapot whistle, filling water glass, washing hands, brushing teeth, soaping hands, having shower, washing machine, flushing toilet, drying hair, eating snack, glass dropping, door opening, yawning, coughing, laughing, others).
