What sound are you hearing? It may depend on the words you read

Listen to this short audio clip: The clip plays two notes that are two full octaves apart. That's a greater range than many people can produce vocally. It should be easy for anyone to tell the difference between these two notes, even when heard in isolation, right? Not necessarily. A team led by Ulrich Weger has found a scenario where people make systematic errors judging these two very different notes. While most people get the notes right most of the time, by introducing a wrinkle into t