Step 1: Define the Market
We use FCC-licensed coverage contours to determine which New York counties each station's signal reaches. Then we pull the Census population for those counties. This gives us the total addressable market — the number of people who can hear the station.
Step 2: Apply Radio Penetration
Nielsen reports that 93% of American adults listen to radio every month. We apply this rate to the adult population (18+) in each station's coverage area. This gives us the total number of radio listeners in the market.
Step 3: Allocate by Format
Nielsen publishes national audience share by format: Country holds 13.8% of all listening, News/Talk holds 12.3%, Adult Contemporary 7.5%, Classic Rock 8.1%. We apply these shares to each station based on its format, with adjustments for small-market dynamics (fewer stations means each one captures a larger share).
Step 4: Validate with Streaming Data
We measure streaming listeners directly — exact counts, every hour, every day. Industry research shows streaming represents 2-5% of total radio listening. We use our measured streaming data as a floor check: if the streaming-implied audience is higher than our format share estimate, we know we may be underestimating.
Step 5: Cross-Validate
The final estimate for each station is the highest defensible value across all layers. No station exceeds 30% of adults in its coverage area. Every number traces back to a credible source.