I often heard the sound of the whistles from the steam trains.
この場合、次のように言うと良いですよ。
ーSteam locomotives used to go through the town I grew up in. When I was studying at home, I often heard the sound of the whistles from the trains.
「私の住んでいた町にSLが通っていた。家で勉強をしていると（SLの）汽笛の音がよく聞こえた」
SLは steam locomotives や steam trains と言えます。
汽笛の音は sound of the whistles のように言えます。
ご参考まで！
"I could hear the sound of the steam train's whistle well."
"I could really hear the whistle from the steam train."
- "I could hear the sound of the steam train's whistle well."
"I could hear ~ well" 「〜よく聞こえた」
"the sound of ~" 「〜の音」
"the steam train's whistle" 「SLの汽笛」
SLは "Steam Locomotive" ですが英語でよく "steam train" や "steam engine" を言われます。
- "I could really hear the whistle from the steam train."
"I could really hear ~" 「〜をよく聞こえた」
"the whistle from the steam train" 「SLの汽笛」
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