彼の声は

his voice is

→ 彼
phrase Rare #27,133
his voice is は marks 彼の声 (his voice) as the topic; the sentence continues with a description or statement about it.
JA: 彼の声はとても落ち着いている。
EN: His voice is very calming.

彼の声は怒りで震えた。

His voice trembled with anger.

彼の声は顔と合わない。

His voice doesn’t match his face.

彼の声は奇跡だ

His voice is a miracle.

— コーラス (2004)

彼の声は私たちの耳まで達した。

His voice reached our ears.

彼女の手を放すと彼の声は真剣になった。

When he let go of her hand, his voice became serious.

彼の声は大きい。

His voice is loud.