Hello @Saurabh @Mani
If the store owner is on Order page and meanwhile there is a new order the Store owner Alert notification tone doesn't buzz.
And if he forgot to go back to the dashboard and remained busy with billing or any in house thing the order will be delayed for long or the customer can cancel the order.
I think the alert tone & order notification should buzz/shown even on the order page for new orders.
Please look into this matter on high priority.
regards