Table 2.

Illustration of the composition of speech samples (disguised to sound younger/natural/disguised to sound older) in three different listener groups.

Listener group	1	2	3
Speaker 1♀∗		natural	older
Speaker 2♀∗	older		natural
Speaker 3♀∗	natural	older
(…)
Speaker 7♂∗		natural	older
Speaker 8♂∗	older		natural
Speaker 9♂∗	natural	older
(…)
Speaker 13♀∗∗	younger	natural	older
Speaker 14♀∗∗	older	younger	natural
Speaker 15♀∗∗	natural	older	younger
(…)
Speaker 19♂∗∗	younger	natural	older
Speaker 20♂∗∗	older	younger	natural
Speaker 21♂∗∗	natural	older	younger
(…)
Speaker 34♂∗∗∗	younger	natural	older
Speaker 35♂∗∗∗	older	younger	natural
Speaker 36♂∗∗∗	natural	older	younger

^∗20–15 years, ^∗∗40–45 years, ^∗∗∗60–65 years.