how many people are in the audio sample? how many listeners do you assign for a factor what is the trf for speakers how many listeners does a speakers have how many listeners are needed to test speakers? how many users per speaker if the test is to determine which factor is not shown twice, how many listeners can i get? how to assign participants to the different levels of audio factor how many speakers in an experiment how many listeners per speaker how many listeners per speaker who should listen to the speaker how many listeners in a test how many people in a sample to be tested at all the speakers how to assign a factor test how to assign audio to factor how many people do i need to listen to every speaker in an experiment? how many listeners does a speaker have how do i design an experiment in which participants see all levels of one factor but not the other? how many listeners in one audio sample