diff --git a/webspeechapi/webspeechapi-tests.ts b/webspeechapi/webspeechapi-tests.ts
new file mode 100644
index 000000000..3479f897d
--- /dev/null
+++ b/webspeechapi/webspeechapi-tests.ts
@@ -0,0 +1,152 @@
+///<reference path="webspeechapi.d.ts" />
+
+/*
+Examples from the spec:
+https://dvcs.w3.org/hg/speech-api/raw-file/tip/speechapi.html#examples-recognition
+*/
+
+// 6.1 Speech Recognition Examples
+
+// Example 1
+declare var q: HTMLInputElement;
+() => {
+    var recognition = new SpeechRecognition();
+    recognition.onresult = function (event) {
+        if (event.results.length > 0) {
+            q.value = event.results[0][0].transcript;
+            q.form.submit();
+        }
+    }
+}
+
+// Example 2
+declare var select: HTMLSelectElement;
+() => {
+    var recognition = new SpeechRecognition();
+    recognition.maxAlternatives = 10;
+    recognition.onresult = function (event) {
+        if (event.results.length > 0) {
+            var result = event.results[0];
+            for (var i = 0; i < result.length; ++i) {
+                var text = result[i].transcript;
+                select.options[i] = new Option(text, text);
+            }
+        }
+    }
+
+    function start() {
+        select.options.length = 0;
+        recognition.start();
+    }
+}
+
+// Example 3
+/*
+This example has some changes from the one in spec.
+`var i = resultIndex` -> `var i = event.resultIndex` (Recorded as Errata 16)
+`event.results.final` -> `event.results[i].final`
+*/
+declare var textarea: HTMLTextAreaElement;
+declare var button: HTMLButtonElement;
+() => {
+    var recognizing: boolean;
+    var recognition = new SpeechRecognition();
+    recognition.continuous = true;
+    reset();
+    recognition.onend = reset;
+
+    recognition.onresult = function (event) {
+        for (var i = event.resultIndex; i < event.results.length; ++i) {
+            if (event.results[i].final) {
+                textarea.value += event.results[i][0].transcript;
+            }
+        }
+    }
+
+    function reset() {
+        recognizing = false;
+        button.innerHTML = "Click to Speak";
+    }
+
+    function toggleStartStop() {
+        if (recognizing) {
+            recognition.stop();
+            reset();
+        } else {
+            recognition.start();
+            recognizing = true;
+            button.innerHTML = "Click to Stop";
+        }
+    }
+}
+
+// Example 4
+/*
+This example has a change from the one in spec.
+`recognition.interim = true;` -> `recognition.interimResults = true;` (Recorded as Errata 1)
+*/
+declare var button: HTMLButtonElement;
+declare var final_span: HTMLSpanElement;
+declare var interim_span: HTMLSpanElement;
+() => {
+    var recognizing: boolean;
+    var recognition = new SpeechRecognition();
+    recognition.continuous = true;
+    recognition.interimResults = true;
+    reset();
+    recognition.onend = reset;
+
+    recognition.onresult = function (event) {
+        var final = "";
+        var interim = "";
+        for (var i = 0; i < event.results.length; ++i) {
+            if (event.results[i].final) {
+                final += event.results[i][0].transcript;
+            } else {
+                interim += event.results[i][0].transcript;
+            }
+        }
+        final_span.innerHTML = final;
+        interim_span.innerHTML = interim;
+    }
+
+    function reset() {
+        recognizing = false;
+        button.innerHTML = "Click to Speak";
+    }
+
+    function toggleStartStop() {
+        if (recognizing) {
+            recognition.stop();
+            reset();
+        } else {
+            recognition.start();
+            recognizing = true;
+            button.innerHTML = "Click to Stop";
+            final_span.innerHTML = "";
+            interim_span.innerHTML = "";
+        }
+    }
+}
+
+
+// 6.2 Speech Synthesis Examples
+
+// Example 1
+/*
+This example has a change from the one in spec.
+`SpeechSynthesisUtterance('Hello World')` -> `new SpeechSynthesisUtterance('Hello World')`
+*/
+() => {
+    speechSynthesis.speak(new SpeechSynthesisUtterance('Hello World'));
+}
+
+//Example 2
+() => {
+    var u = new SpeechSynthesisUtterance();
+    u.text = 'Hello World';
+    u.lang = 'en-US';
+    u.rate = 1.2;
+    u.onend = function (event) { alert('Finished in ' + event.elapsedTime + ' seconds.'); }
+    speechSynthesis.speak(u);
+}
\ No newline at end of file
diff --git a/webspeechapi/webspeechapi.d.ts b/webspeechapi/webspeechapi.d.ts
index a0c088bab..47e7ce561 100644
--- a/webspeechapi/webspeechapi.d.ts
+++ b/webspeechapi/webspeechapi.d.ts
@@ -46,12 +46,14 @@ interface SpeechRecognitionAlternative {
 interface SpeechRecognitionResult {
     length: number;
     item(index: number): SpeechRecognitionAlternative;
+    [index: number]: SpeechRecognitionAlternative;
     final: boolean;
 }
 
 interface SpeechRecognitionResultList {
     length: number;
     item(index: number): SpeechRecognitionResult;
+    [index: number]: SpeechRecognitionResult;
 }
 
 interface SpeechRecognitionEvent extends Event {
@@ -75,6 +77,7 @@ declare var webkitSpeechGrammar: SpeechGrammarStatic;
 interface SpeechGrammarList {
     length: number;
     item(index: number): SpeechGrammar;
+    [index: number]: SpeechGrammar;
     addFromURI(src: string, weight: number): void;
     addFromString(string: string, weight: number): void;
 }
@@ -102,6 +105,7 @@ interface SpeechSynthesisGetter {
 }
 interface Window extends SpeechSynthesisGetter {
 }
+declare var speechSynthesis: SpeechSynthesis;
 
 interface SpeechSynthesisUtterance extends EventTarget {
     text: string;
@@ -143,4 +147,5 @@ interface SpeechSynthesisVoice {
 interface SpeechSynthesisVoiceList {
     length: number;
     item(index: number): SpeechSynthesisVoice;
+    [index: number]: SpeechSynthesisVoice;
 }
\ No newline at end of file