When Reagan was governor of California, some linguists created a recorded message very similar to the following Almost all politically savvy adults who heard this recording claimed to have heard Reagan in place of the cough & put the cough sound elsewhere in the sentence uttered. Note that the clue to the name of the governor was at the end of the sentence. The above experiment indicates that conversations are processed subconsciously & then presented to the conscious mind circa 5-10 seconds later. This is probably required in order to deal with regional accents & other phonetic problems in interpreting verbal communication. Experiments with musical sounds indicate that such processing does not take place. For example an incorrect or missing note in a melody is recognized as an error.