Perception of voice pitch waver over headphones and loudspeakers
Astrid Schmidt-Nielsen, Stephanie S. Everett · The Journal of the Acoustical Society of America · 1982
The perception of pitch waver in synthetic vowels was investigated. The waver was more easily detected when heard over a loudspeaker than over headphones. This effect seems to be related to the occurrence of amplitude variations as well as pitch variations in a live room environment.