lec 5- spatialisation

Question 1

is sound spatial?

Answer 1

yes it is 3d

Question 2

what are the two things that help us with spatial sound perception?

Answer 2

-Interaural time delay (ITD): arrival time of sound
-interaural level difference (ILD): loudness of sound, difference in amplitude

Question 3

what is Doppler shift?

Answer 3

the change in frequency of a wave caused by the relative motion between source and the observer (e.g. car horn driving by)

Question 4

what are some techniques of sound spatialisation?

Answer 4

-monophonic sound: telephone
-stereophonic sound: CD, TV
-multiphonic sound: home cinema
-2 stereo signal
-3 stereo signal
-5.1: helps improve sound for off center listeners
-surround speakers: makes it seem like sound is coming from around
-low frequency effect

Question 5

what is binaural recording?

Answer 5

-using a dummy head with ears to record sounds as if the human was their to receive them

Question 6

what is ambisonic surround sound?

Answer 6

-the use of 4 to 8 speakers to have a 3d sound effect

Question 7

what is beamforming?

Answer 7

a line of speakers used to move sound by playing them linearly with a delay