diff --git a/src/index.css b/src/index.css
index 25562e3..0272651 100644
--- a/src/index.css
+++ b/src/index.css
@@ -26,6 +26,8 @@ limitations under the License.
   --inter-unicode-range: U+0000-20e2, U+20e4-23ce, U+23d0-24c1, U+24c3-259f,
     U+25c2-2664, U+2666-2763, U+2765-2b05, U+2b07-2b1b, U+2b1d-10FFFF;
   --primaryColor: #0dbd8b;
+  --primaryColor-20: #0dbd8b33;
+  --alert-20: #ff5b5533;
   --bgColor1: #15191e;
   --bgColor2: #21262c;
   --bgColor3: #444;
diff --git a/src/room/PTTButton.module.css b/src/room/PTTButton.module.css
index d6b7a76..fb849ad 100644
--- a/src/room/PTTButton.module.css
+++ b/src/room/PTTButton.module.css
@@ -14,14 +14,10 @@
 
 .talking {
   background-color: #0dbd8b;
-  box-shadow: 0px 0px 0px 17px rgba(13, 189, 139, 0.2),
-    0px 0px 0px 34px rgba(13, 189, 139, 0.2);
   cursor: unset;
 }
 
 .error {
   background-color: #ff5b55;
   border-color: #ff5b55;
-  box-shadow: 0px 0px 0px 17px rgba(255, 91, 85, 0.2),
-    0px 0px 0px 34px rgba(255, 91, 85, 0.2);
 }
diff --git a/src/room/PTTButton.tsx b/src/room/PTTButton.tsx
index 4da324c..62299a1 100644
--- a/src/room/PTTButton.tsx
+++ b/src/room/PTTButton.tsx
@@ -16,6 +16,7 @@ limitations under the License.
 
 import React, { useCallback, useEffect, useState, createRef } from "react";
 import classNames from "classnames";
+import { useSpring, animated } from "@react-spring/web";
 
 import styles from "./PTTButton.module.css";
 import { ReactComponent as MicIcon } from "../icons/Mic.svg";
@@ -27,6 +28,7 @@ interface Props {
   activeSpeakerDisplayName: string;
   activeSpeakerAvatarUrl: string;
   activeSpeakerIsLocalUser: boolean;
+  activeSpeakerVolume: number;
   size: number;
   startTalking: () => void;
   stopTalking: () => void;
@@ -44,6 +46,7 @@ export const PTTButton: React.FC<Props> = ({
   activeSpeakerDisplayName,
   activeSpeakerAvatarUrl,
   activeSpeakerIsLocalUser,
+  activeSpeakerVolume,
   size,
   startTalking,
   stopTalking,
@@ -130,12 +133,32 @@ export const PTTButton: React.FC<Props> = ({
       );
     };
   }, [onWindowMouseUp, onWindowTouchEnd, onButtonTouchStart, buttonRef]);
+
+  const { shadow } = useSpring({
+    shadow: (Math.max(activeSpeakerVolume, -70) + 70) * 0.6,
+    config: {
+      clamp: true,
+      tension: 300,
+    },
+  });
+  const shadowColor = showTalkOverError
+    ? "var(--alert-20)"
+    : "var(--primaryColor-20)";
+
   return (
-    <button
+    <animated.button
       className={classNames(styles.pttButton, {
         [styles.talking]: activeSpeakerUserId,
         [styles.error]: showTalkOverError,
       })}
+      style={{
+        boxShadow: shadow.to(
+          (s) =>
+            `0px 0px 0px ${s}px ${shadowColor}, 0px 0px 0px ${
+              2 * s
+            }px ${shadowColor}`
+        ),
+      }}
       onMouseDown={onButtonMouseDown}
       ref={buttonRef}
     >
@@ -154,6 +177,6 @@ export const PTTButton: React.FC<Props> = ({
           className={styles.avatar}
         />
       )}
-    </button>
+    </animated.button>
   );
 };
diff --git a/src/room/PTTCallView.tsx b/src/room/PTTCallView.tsx
index e4aadf1..5e3f304 100644
--- a/src/room/PTTCallView.tsx
+++ b/src/room/PTTCallView.tsx
@@ -123,6 +123,7 @@ export const PTTCallView: React.FC<Props> = ({
     talkOverEnabled,
     setTalkOverEnabled,
     activeSpeakerUserId,
+    activeSpeakerVolume,
     startTalking,
     stopTalking,
     transmitBlocked,
@@ -221,6 +222,7 @@ export const PTTCallView: React.FC<Props> = ({
             activeSpeakerDisplayName={activeSpeakerDisplayName}
             activeSpeakerAvatarUrl={activeSpeakerAvatarUrl}
             activeSpeakerIsLocalUser={activeSpeakerIsLocalUser}
+            activeSpeakerVolume={activeSpeakerVolume}
             size={pttButtonSize}
             startTalking={startTalking}
             stopTalking={stopTalking}
diff --git a/src/room/usePTT.ts b/src/room/usePTT.ts
index e677e9a..7710655 100644
--- a/src/room/usePTT.ts
+++ b/src/room/usePTT.ts
@@ -65,6 +65,7 @@ export interface PTTState {
   talkOverEnabled: boolean;
   setTalkOverEnabled: (boolean) => void;
   activeSpeakerUserId: string;
+  activeSpeakerVolume: number;
   startTalking: () => void;
   stopTalking: () => void;
   transmitBlocked: boolean;
@@ -108,6 +109,7 @@ export const usePTT = (
       isAdmin,
       talkOverEnabled,
       activeSpeakerUserId,
+      activeSpeakerVolume,
       transmitBlocked,
     },
     setState,
@@ -121,6 +123,7 @@ export const usePTT = (
       talkOverEnabled: false,
       pttButtonHeld: false,
       activeSpeakerUserId: activeSpeakerFeed ? activeSpeakerFeed.userId : null,
+      activeSpeakerVolume: -Infinity,
       transmitBlocked: false,
     };
   });
@@ -152,15 +155,11 @@ export const usePTT = (
       playClip(PTTClipID.BLOCKED);
     }
 
-    setState((prevState) => {
-      return {
-        ...prevState,
-        activeSpeakerUserId: activeSpeakerFeed
-          ? activeSpeakerFeed.userId
-          : null,
-        transmitBlocked: blocked,
-      };
-    });
+    setState((prevState) => ({
+      ...prevState,
+      activeSpeakerUserId: activeSpeakerFeed ? activeSpeakerFeed.userId : null,
+      transmitBlocked: blocked,
+    }));
   }, [
     playClip,
     groupCall,
@@ -173,7 +172,7 @@ export const usePTT = (
 
   useEffect(() => {
     for (const callFeed of userMediaFeeds) {
-      callFeed.addListener(CallFeedEvent.MuteStateChanged, onMuteStateChanged);
+      callFeed.on(CallFeedEvent.MuteStateChanged, onMuteStateChanged);
     }
 
     const activeSpeakerFeed = getActiveSpeakerFeed(userMediaFeeds, groupCall);
@@ -185,14 +184,30 @@ export const usePTT = (
 
     return () => {
       for (const callFeed of userMediaFeeds) {
-        callFeed.removeListener(
-          CallFeedEvent.MuteStateChanged,
-          onMuteStateChanged
-        );
+        callFeed.off(CallFeedEvent.MuteStateChanged, onMuteStateChanged);
       }
     };
   }, [userMediaFeeds, onMuteStateChanged, groupCall]);
 
+  const onVolumeChanged = useCallback((volume: number) => {
+    setState((prevState) => ({
+      ...prevState,
+      activeSpeakerVolume: volume,
+    }));
+  }, []);
+
+  useEffect(() => {
+    const activeSpeakerFeed = getActiveSpeakerFeed(userMediaFeeds, groupCall);
+    activeSpeakerFeed?.on(CallFeedEvent.VolumeChanged, onVolumeChanged);
+    return () => {
+      activeSpeakerFeed?.off(CallFeedEvent.VolumeChanged, onVolumeChanged);
+      setState((prevState) => ({
+        ...prevState,
+        activeSpeakerVolume: -Infinity,
+      }));
+    };
+  }, [activeSpeakerUserId, onVolumeChanged, userMediaFeeds, groupCall]);
+
   const startTalking = useCallback(async () => {
     if (pttButtonHeld) return;
 
@@ -317,6 +332,7 @@ export const usePTT = (
     talkOverEnabled,
     setTalkOverEnabled,
     activeSpeakerUserId,
+    activeSpeakerVolume,
     startTalking,
     stopTalking,
     transmitBlocked,