Critics who have worried that HD Radio will bring interference chaos to the AM band, at night or otherwise, may soon get to find out if they were correct.
All AMs are allowed to go digital at night under this week’s vote. Audio Division Chief Peter Doyle told Radio World that AMs already on with IBOC need no further permission to add night service; those not transmitting in HD-R need to submit a notification letter within 10 days of their conversion.
To date only about 200 AM stations are airing HD Radio.
