TSL is not shrinking, depending on the station locally. Overall listening cume is shrinking. In short, there are not as many people listening to local radio stations on any platform, as there were a few years ago. Local Talk Radio has the most loyal listeners, the highest TSL, and exclusive content. I am a huge fan of Country and local talk radio. The difference is I have not listened to YRK in probably ten years. I listen to Sirius country channels. I do listen to WBEN because of the local exclusive content. Plus, advertisers love talk radio. The key, it must be REALLY unique.
That is totally wrong, Buddy.
What is decreasing is the number of hours of weekly listening by the average listener. In 2000, the PUR, or "persons using radio" 6 AM to Midnight, M-S, was around 19, meaning that 19% of all people were listening on average. Today, the figure in the pre-Coronavirus period of "Fall" and the first months of "Spring" was around 7% with a variance of +/- 1 in the markets I look at. That is, of course, PPM.
Due to rounding, the PUR in diary markets is a bit higher, but it is still off by about half of what it was 20 years ago.
On the other hand, radio's collective cume, which back in 2000 was 94% of all persons, is now around 89%. There has been a loss of abut 55 to 6% in radio's "circulation" but (depending on the measurement system) over half to nearly 2/3 in the average weekly times spent listening.
This is true in every market, whether it is a Top 10 PMM one or # 225 and a diary market.