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+---
+title: SpeechSynthesisUtterance
+slug: Web/API/SpeechSynthesisUtterance
+tags:
+  - API
+  - Experimental
+  - Interface
+  - NeedsTranslation
+  - Reference
+  - SpeechSynthesisUtterance
+  - TopicStub
+  - Web Speech API
+  - speech
+  - synthesis
+translation_of: Web/API/SpeechSynthesisUtterance
+---
+<p>{{APIRef("Web Speech API")}}{{SeeCompatTable}}</p>
+
+<p>The <strong><code>SpeechSynthesisUtterance</code></strong> interface of the <a href="/en-US/docs/Web/API/Web_Speech_API">Web Speech API</a> represents a speech request. It contains the content the speech service should read and information about how to read it (e.g. language, pitch and volume.)</p>
+
+<h2 id="Constructor">Constructor</h2>
+
+<dl>
+ <dt>{{domxref("SpeechSynthesisUtterance.SpeechSynthesisUtterance()")}}</dt>
+ <dd>Returns a new <code>SpeechSynthesisUtterance</code> object instance.</dd>
+</dl>
+
+<h2 id="Properties">Properties</h2>
+
+<p><em><code>SpeechSynthesisUtterance</code> also inherits properties from its parent interface, {{domxref("EventTarget")}}.</em></p>
+
+<dl>
+ <dt>{{domxref("SpeechSynthesisUtterance.lang")}}</dt>
+ <dd>Gets and sets the language of the utterance.</dd>
+ <dt>{{domxref("SpeechSynthesisUtterance.pitch")}}</dt>
+ <dd>Gets and sets the pitch at which the utterance will be spoken at.</dd>
+ <dt>{{domxref("SpeechSynthesisUtterance.rate")}}</dt>
+ <dd>Gets and sets the speed at which the utterance will be spoken at.</dd>
+ <dt>{{domxref("SpeechSynthesisUtterance.text")}}</dt>
+ <dd>Gets and sets the text that will be synthesised when the utterance is spoken.</dd>
+ <dt>{{domxref("SpeechSynthesisUtterance.voice")}}</dt>
+ <dd>Gets and sets the voice that will be used to speak the utterance.</dd>
+ <dt>{{domxref("SpeechSynthesisUtterance.volume")}}</dt>
+ <dd>Gets and sets the volume that the utterance will be spoken at.</dd>
+</dl>
+
+<h2 id="Events">Events</h2>
+
+<p>Listen to these events using <code><a href="/en-US/docs/Web/API/EventTarget/addEventListener">addEventListener()</a></code> or by assigning an event listener to the <code>on<em>eventname</em></code> property of this interface.</p>
+
+<dl>
+ <dt><code><a href="/en-US/docs/Web/API/SpeechSynthesisUtterance/boundary_event">boundary</a></code></dt>
+ <dd>Fired when the spoken utterance reaches a word or sentence boundary.<br>
+ Also available via the <code><a href="/en-US/docs/Web/API/SpeechSynthesisUtterance/onboundary">onboundary</a></code> property.</dd>
+ <dt><code><a href="/en-US/docs/Web/API/SpeechSynthesisUtterance/end_event">end</a></code></dt>
+ <dd>Fired when the utterance has finished being spoken.<br>
+ Also available via the <code><a href="/en-US/docs/Web/API/SpeechSynthesisUtterance/onend">onend</a></code> property.</dd>
+ <dt><code><a href="/en-US/docs/Web/API/SpeechSynthesisUtterance/error_event">error</a></code></dt>
+ <dd>Fired when an error occurs that prevents the utterance from being succesfully spoken.<br>
+ Also available via the <code><a href="/en-US/docs/Web/API/SpeechSynthesisUtterance/onerror">onerror</a></code> property</dd>
+ <dt><code><a href="/en-US/docs/Web/API/SpeechSynthesisUtterance/mark_event">mark</a></code></dt>
+ <dd>Fired when the spoken utterance reaches a named SSML "mark" tag.<br>
+ Also available via the <code><a href="/en-US/docs/Web/API/SpeechSynthesisUtterance/onmark">onmark</a></code> property.</dd>
+ <dt><code><a href="/en-US/docs/Web/API/SpeechSynthesisUtterance/pause_event">pause</a></code></dt>
+ <dd>Fired when the utterance is paused part way through.<br>
+ Also available via the <code><a href="/en-US/docs/Web/API/SpeechSynthesisUtterance/onpause">onpause</a></code> property.</dd>
+ <dt><code><a href="/en-US/docs/Web/API/SpeechSynthesisUtterance/resume_event">resume</a></code></dt>
+ <dd>Fired when a paused utterance is resumed.<br>
+ Also available via the <code><a href="/en-US/docs/Web/API/SpeechSynthesisUtterance/onresume">onresume</a></code> property.</dd>
+ <dt><code><a href="/en-US/docs/Web/API/SpeechSynthesisUtterance/start_event">start</a></code></dt>
+ <dd>Fired when the utterance has begun to be spoken.<br>
+ Also available via the <code><a href="/en-US/docs/Web/API/SpeechSynthesisUtterance/onstart">onstart</a></code> property.</dd>
+</dl>
+
+<h2 id="Examples">Examples</h2>
+
+<p>In our basic <a href="https://mdn.github.io/web-speech-api/speak-easy-synthesis/">Speech synthesiser demo</a> (<a href="https://github.com/mdn/web-speech-api/tree/master/speak-easy-synthesis">source</a>), we first grab a reference to the SpeechSynthesis controller using <code>window.speechSynthesis</code>. After defining some necessary variables, we retrieve a list of the voices available using {{domxref("SpeechSynthesis.getVoices()")}} and populate a select menu with them so the user can choose what voice they want.</p>
+
+<p>Inside the <code>inputForm.onsubmit</code> handler, we stop the form submitting with {{domxref("Event.preventDefault","preventDefault()")}}, use the {{domxref("SpeechSynthesisUtterance.SpeechSynthesisUtterance()", "constructor")}} to create a new utterance instance containing the text from the text {{htmlelement("input")}}, set the utterance's {{domxref("SpeechSynthesisUtterance.voice","voice")}} to the voice selected in the {{htmlelement("select")}} element, and start the utterance speaking via the {{domxref("SpeechSynthesis.speak()")}} method.</p>
+
+<pre class="brush: js notranslate">var synth = window.speechSynthesis;
+var voices = synth.getVoices();
+
+var inputForm = document.querySelector('form');
+var inputTxt = document.querySelector('input');
+var voiceSelect = document.querySelector('select');
+
+for(var i = 0; i &lt; voices.length; i++) {
+  var option = document.createElement('option');
+  option.textContent = voices[i].name + ' (' + voices[i].lang + ')';
+  option.value = i;
+  voiceSelect.appendChild(option);
+}
+
+inputForm.onsubmit = function(event) {
+  event.preventDefault();
+
+  var utterThis = new SpeechSynthesisUtterance(inputTxt.value);
+  utterThis.voice = voices[voiceSelect.value];
+  synth.speak(utterThis);
+  inputTxt.blur();
+}</pre>
+
+<h2 id="Specifications">Specifications</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">Specification</th>
+   <th scope="col">Status</th>
+   <th scope="col">Comment</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('Web Speech API', '#tts-section', 'SpeechSynthesisUtterance')}}</td>
+   <td>{{Spec2('Web Speech API')}}</td>
+   <td></td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility">Browser compatibility</h2>
+
+<div>
+
+
+<p>{{Compat("api.SpeechSynthesisUtterance")}}</p>
+</div>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li><a href="/en-US/docs/Web/API/Web_Speech_API">Web Speech API</a></li>
+</ul>
diff --git a/files/zh-cn/web/api/speechsynthesisutterance/voice/index.html b/files/zh-cn/web/api/speechsynthesisutterance/voice/index.html
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+---
+title: SpeechSynthesisUtterance.voice
+slug: Web/API/SpeechSynthesisUtterance/voice
+translation_of: Web/API/SpeechSynthesisUtterance/voice
+---
+<div>&lt;trans newtip="{{APIRef(“Web语音API”)}}{SeeCompattable}" oldtip="{{APIRef("Web Speech API")}}{{SeeCompatTable}}"&gt;{{APIRef(“Web语音API”)}}{SeeCompattable}&lt;/trans&gt;</div>
+
+<p>The <strong><code>voice</code></strong> property of the {{domxref("SpeechSynthesisUtterance")}} interface gets and sets the voice that will be used to speak the utterance.</p>
+
+<p>This should be set to one of the {{domxref("SpeechSynthesisVoice")}} objects returned by {{domxref("SpeechSynthesis.getVoices()")}}. If not set by the time the utterance is spoken, the voice used will be the most suitable default voice available for the utterance's {{domxref("SpeechSynthesisUtterance.lang","lang")}} setting.</p>
+
+<h2 id="Syntax">Syntax</h2>
+
+<pre class="syntaxbox notranslate">var myVoice = speechSynthesisUtteranceInstance.voice;
+speechSynthesisUtteranceInstance.voice = speechSynthesisVoiceInstance;
+</pre>
+
+<h3 id="Value">Value</h3>
+
+<p>A {{domxref("SpeechSynthesisVoice")}} object.</p>
+
+<h2 id="Examples">Examples</h2>
+
+<pre class="brush: js notranslate"><code class="language-js"><span class="keyword token">var</span> synth <span class="operator token">=</span> window<span class="punctuation token">.</span>speechSynthesis<span class="punctuation token">;</span>
+
+<span class="keyword token">var</span> inputForm <span class="operator token">=</span> document<span class="punctuation token">.</span><span class="function token">querySelector</span><span class="punctuation token">(</span><span class="string token">'form'</span><span class="punctuation token">)</span><span class="punctuation token">;</span>
+<span class="keyword token">var</span> inputTxt <span class="operator token">=</span> document<span class="punctuation token">.</span><span class="function token">querySelector</span><span class="punctuation token">(</span><span class="string token">'input'</span><span class="punctuation token">)</span><span class="punctuation token">;</span>
+<span class="keyword token">var</span> voiceSelect <span class="operator token">=</span> document<span class="punctuation token">.</span><span class="function token">querySelector</span><span class="punctuation token">(</span><span class="string token">'select'</span><span class="punctuation token">)</span><span class="punctuation token">;</span>
+
+<span class="keyword token">var</span> voices <span class="operator token">=</span> synth<span class="punctuation token">.</span><span class="function token">getVoices</span><span class="punctuation token">(</span><span class="punctuation token">)</span><span class="punctuation token">;</span></code>
+
+  ...
+
+inputForm.onsubmit = function(event) {
+  event.preventDefault();
+
+  var utterThis = new SpeechSynthesisUtterance(inputTxt.value);
+  var selectedOption = voiceSelect.selectedOptions[0].getAttribute('data-name');
+  for(i = 0; i &lt; voices.length ; i++) {
+    if(voices[i].name === selectedOption) {
+      utterThis.voice = voices[i];
+    }
+  }
+  synth.speak(utterThis);
+  inputTxt.blur();
+}</pre>
+
+<h2 id="Specifications">Specifications</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">Specification</th>
+   <th scope="col">Status</th>
+   <th scope="col">Comment</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('Web Speech API', '#dom-speechsynthesisutterance-voice', 'voice')}}</td>
+   <td>{{Spec2('Web Speech API')}}</td>
+   <td></td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility">Browser compatibility</h2>
+
+<div>
+
+
+<p>{{Compat("api.SpeechSynthesisUtterance.voice")}}</p>
+</div>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li><a href="/en-US/docs/Web/API/Web_Speech_API">Web Speech API</a></li>
+</ul>