diff --git a/src/routes/estimation/[roomId]/+page.svelte b/src/routes/estimation/[roomId]/+page.svelte
index f71b95b..f493fba 100644
--- a/src/routes/estimation/[roomId]/+page.svelte
+++ b/src/routes/estimation/[roomId]/+page.svelte
@@ -193,7 +193,7 @@
 	<EstimateGroupsList {estimateGroups} />
 {/if}
 
-<audio src="/call-to-attention.mp3" bind:this={audioElement}></audio>
+<audio src="/call-to-attention-50-percent-volume.mp3" bind:this={audioElement}></audio>
 
 <style>
 	.button-container {
diff --git a/static/call-to-attention-50-percent-volume.mp3 b/static/call-to-attention-50-percent-volume.mp3
new file mode 100644
index 0000000..47ccc24
Binary files /dev/null and b/static/call-to-attention-50-percent-volume.mp3 differ