Certain aspects of the contacting and decontacting phases of the vocal folds can be
analyzed indirectly through the electroglottographic (EGG
) signal. Since 1957
1
EGG has been widely used in the clinic and in voice research given that it provides
information regarding the contact area of the vocal folds during phonation
2
. Its main quantitative parameters: contact quotient [
3
,
4
,
5
,
6
,
7
,
8
,
9
], open quotient [
3
,
4
,
10
,
11
,
12
] and fundamental frequency estimation [
13
,
14
,
15
,
- Vlot C.
- Ogawa M.
- Hosokawa K.
- Iwahashi T.
- Kato C.
- Inohara H.
Investigation of the immediate effects of humming on vocal fold vibration irregularity
using electroglottography and high-speed laryngoscopy in patients with organic voice
disorders.
Journal of voice : official journal of the Voice Foundation. 2017; 31: 48-56
16
,
17
] have been widely used in research studies and in the voice clinic. There has been
a significant increase in related publications in recent years with a so called “golden
era” in the beginning and middle of the 1990s, as described in a thorough recent review
on EGG conducted by Herbst
18
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Article info
Publication history
Published online: June 20, 2021
Accepted:
May 10,
2021
Publication stage
In Press Corrected ProofIdentification
Copyright
© 2021 The Voice Foundation. Published by Elsevier Inc. All rights reserved.
