Question: How was the voice of the Welsh singer referenced in The King of Rock and Roll described?

Context articles: Faenol Festival
Aimée Duffy (EP)
Julie Murphy
Tom Jones discography
The King of Rock and Roll
Dave Edmunds
Tom Jones (singer)
Esyllt Harker
Sion Russell Jones
A.1. On the Jukebox

The Faenol Festival (Welsh: Gŵyl y Faenol ) is a music festival organised by Welsh singer Bryn Terfel, originally held annually on the Faenol Estate (Welsh: "Y Faenol"), near Y Felinheli in Gwynedd, north Wales.
Aimée Duffy is a Welsh-language extended play (EP) by Welsh singer Aimée Duffy (now Duffy), released in 2004 on Welsh record label Awen Records.
 Originally to be entitled "Rock, Roll & Soul", the release came after the singer had come second in a Welsh televised talent show.
Julie Murphy (born 1961) is a Welsh singer who sings in Welsh and English.
 She sings in the Welsh band Fernhill, as well as performing and recording as a solo artist.
 She has also collaborated musically with John Cale (performing with him in the film "Beautiful Mistake"), and Afro Celt Sound System (in a duet with Robert Plant of Led Zeppelin).
Tom Jones, real name Thomas John Woodward KBE (born 7 June 1940), is a Welsh singer whose career has spanned six decades, from his emergence as a vocalist in the mid-1960s with a string of top hits, regular touring, appearances in Las Vegas (1967–2011), and career comebacks.
 Jones's powerful voice has been described as a "full-throated, robust baritone".
 His performing range has included pop, rock, R&B, show tunes, country, dance, soul and gospel.
The King of Rock and Roll is Little Richard's second album for Reprise Records, a follow-up album that contained one original Little Richard song, the gospel rock "In the Name" and a new song co-written by Producer H. B. Barnum, "Green Power", the single release; and versions of tracks by artists as diverse as Hank Williams, The Temptations, Martha and the Vandellas, Three Dog Night, and The Rolling Stones.
 The title track, a mock braggadocio that referenced Tom Jones, Elvis Presley, Ike & Tina Turner, Sly and the Family Stone, and Aretha Franklin, amongst others, upset some fans, although the album's title tune got good airplay in New York - a 1950s style jump blues, with an exceptional Little Richard shouting vocal!
 But fans and critics were further upset that the album did not feature acoustic piano and that most tracks were badly mixed, with an intrusive girl group chorus.
David William Edmunds (born 15 April 1944) is a Welsh singer, guitarist, actor and record producer.
 Although he is mainly associated with pub rock and new wave, having many hits in the 1970s and early 1980s, his natural leaning has always been towards 1950s style rock and roll.
Sir Thomas John Woodward OBE (born 7 June 1940), also known by his stage name Tom Jones, is a Welsh singer.
 His career has spanned six decades, from his emergence as a vocalist in the mid-1960s with a string of top hits, regular touring, appearances in Las Vegas (1967–2011), and career comebacks—to coaching on "The Voice UK" from 2012 (with the exception of 2016).
 Jones's powerful voice has been described as a "full-throated, robust baritone".
Esyllt Harker (1947 - May 31 2014) was a Welsh singer, actor and storyteller.
 She was born in Birkenhead to Welsh parents and grew up speaking Welsh.
Siôn Russell Jones is a Welsh singer and songwriter from Cardiff.
with songs featured in the Welsh comedy 'Stella' starring Ruth Jones name="Revealed: The 10 hottest new Welsh musical acts to look out for"
"A.1.
 On the Jukebox" is a rock and roll song by Welsh singer and guitarist Dave Edmunds.
 Released as a single in 1979, it originally appeared as the third song on the second side of his 1978 album "Tracks on Wax 4".
 The song was written by Edmunds and Will Birch.