Congress wants AM radio in all new cars–trade groups say that’s a mistake

Re:Congress wants AM radio in all new cars–trade groups say ... by ianburrell on Tuesday May 23, 2023 @12:45PM (#36046921)

The radio bands are small. Each AM HD station uses 30 kHz which gives 40-60 kbit. That isn't enough for full fidelity music. And that is using more than one frequency since analog AM is 10kHz stations.

AM band uses a large frequency range, 530-1700 kHz, but the total bandwidth is small, slightly more than 1MHz.

Telephone is bad compared to AM and really bad compared to FM or CDs. Human voice fits in much smaller bandwidth than music.

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Re:Congress wants AM radio in all new cars–trade groups say ... by cf100clunk on Tuesday May 23, 2023 @01:16PM (#36047500)

> Each AM HD station uses 30 kHz which gives 40-60 kbit. That isn't enough for full fidelity music

That's part and parcel of station management's programming decisions for HD Radio subchannels on the AM band, hence the focus on ''talk''.

[ Parent | on HN ]