PSYB51H3 Lecture Notes - Lecture 10: Principles Of Grouping, Sound, Temporal Lobe
Document Summary
Limits of temporal coding neurons will fire with frequency of less than 1000 hertz because they simply cannot fire at such a fast rate. The volley principle: one neuron fires and the next takes over and the entire population of the neurons will represent the frequency in its firing pattern. Lowest frequency of harmonic spectrum: fundamental frequency (any multiple of something else. The next frequency sounded with the next one has double frequency, and the third harmonic has triple frequency, etc. ) Auditory system is acutely sensitive to natural relationships between harmonics. Missing-fundamental effect (the next sound wave deletes the next harmonic) & 4 th harmonic overlap in peaks every 4 ms: added up they yield a fluctuation in energy at 250 hz, temporal coding of frequency. Timbre: psychological sensation by which a listener can judge that two sounds that have the same loudness and pitch are dissimilar; conveyed by harmonics and other high frequencies.
