Through the use of an acoustically adjustable listening room and a binaural record/reproduction system, live and binaural subjective evaluations were made of different loudspeakers placed in different room locations. The experimental results from both tests show that listeners' preference ratings for different loudspeakers are significantly influenced by their location within the room. In fact, the positional effects can be larger than the subjective differences between the loudspeakers themselves. The binaural evaluations indicate listeners' preferences are significantly influenced by interactions between the loudspeaker, its location, and the type of program material auditioned. These secondary effects were less significant in the live tests, suggesting that traditional real-time listening tests may be adequate for measuring or controlling these effects.
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