Natural frequencies Fundamental frequencies 11 Piezoelectricity 6 Modal analysis 5 voice 5 Experimental modal analysis 4 Finite element method 4 Humans 4 Resonance frequencies 4 Speech 4 human 4 Directional patterns (antenna) 3 Female 3 Male 3 Multi-functions 3 Natural frequencies and modes 3 Phonation 3 Vibrations (mechanical) 3 Voice 3 article 3 female 3 glottis 3 male 3 multifunction 3 phonation 3 physiology 3 Adhesive lamination 2 Adhesives 2 Adolescent 2 Ambient vibrations 2