diff --git a/1000-hours/sounds-of-american-english/1.1-alphabet.md b/1000-hours/sounds-of-american-english/1.1-alphabet.md
index 2aff9c01..7fc68510 100644
--- a/1000-hours/sounds-of-american-english/1.1-alphabet.md
+++ b/1000-hours/sounds-of-american-english/1.1-alphabet.md
@@ -43,5 +43,5 @@ In British, letter *z* is pronounced as <span class="pho alt">zed</span><span cl
 
 > [!Note]
 >
-> * 合成语音文件使用的是 OpenAI 的 TTS (Text-to-Speech) 和微软的 Edge's TTS。蓝色喇叭背景图标<span class="speak-word-inline" data-audio-us-male="/audios/us/Alpha-us-guy.mp3"></span>是男性语音，红色背景喇叭图标<span class="speak-word-inline" data-audio-us-female="/audios/us/Alpha-us-jen.mp3"></span>是女性语音。
+> * 合成语音文件使用的是 OpenAI 的 TTS (Text-to-Speech) 和微软的 Edge's TTS。蓝色喇叭ø图标<span class="speak-word-inline" data-audio-us-male="/audios/us/Alpha-us-guy.mp3"></span>是男性语音，红色ø喇叭图标<span class="speak-word-inline" data-audio-us-female="/audios/us/Alpha-us-jen.mp3"></span>是女性语音。
 > * The synthesized audio files primarily utilizes OpenAI's TTS (Text-to-Speech) and Microsoft Edge's TTS. The blue background speaker icon<span class="speak-word-inline" data-audio-us-male="/audios/us/Alpha-us-guy.mp3"></span>represents a male voice, whereas the red background speaker icon<span class="speak-word-inline" data-audio-us-female="/audios/us/Alpha-us-jen.mp3"></span>signifies a female voice.
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