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11 Cards in this Set
- Front
- Back
Which characteristics can be used for spatial hearing? |
1. Interaural time differences |
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What is the function of middle ear? |
Impedance matching between air and lymphe liquid, also protection of loud sound. |
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Explain the functions of the inner ear, from the displacement of the oval window to the nerve pulse! |
Inner ear: |
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What do we mean by the frequency-place transformation of the inner ear? |
Deflection of the oval window triggers a wave in the cochlea which spreads on the basilar membrane. The wave reaches a maximum for each frequency at its typical place on the basilar membrane |
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How can we scale the height of a tone? |
1. Sound event scale of tone height (harmonic tone height scale) Equal intervals on the scale correspond to doubling of frequency (octaves, i.e. equal musical intervals). Therefore, it is a logarithmic frequency scale: m[okt]=f/f0, f0=131 Hz |
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What is residual pitch? What is repetition pitch? |
• Residual pitch: If the 1st harmonic is lacking, but the 3rd to 5th harmonic are available, - by deduction from harmonics to fundamental tone |
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What is the loudness level, and how can we measure it? |
The sound pressure level of the 1 kHz tone which is equally loud as a test tone. Measured in "phon". |
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What is loudness, and how can we measure it? |
Intensity of sound. Loudness is the subjective perception of sound pressure. How much tone A is louder as tone B. |
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What is spectral masking? |
You cannot hear a test tone which is close in frequency to a masker even if it is of lower amplitude |
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What is temporal masking? |
You cannot hear a test tone which is quickly following a masker. |
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What is critical band? |
Critical band refers to the frequency bandwidth of the "auditory filter" created by the cochlea, the sense organ of hearing within the inner ear. |