Over the summer break, Jed earns extra cash working as a salesman at Sensational Sound Systems. As one of the most knowledgeable salesmen on staff, Jed tells a young couple shopping for a sound system that the more expensive models are worth the money because they ____.
a. amplify sound up to 160 dB
b. boost frequencies below 80 Hz
c. buffer sounds that reach 60 dB
d. filter out frequencies below 10000 Hz
Question 2
How does our perception of sound change with intensity of the stimulus?
a. Our sound perception changes at the same rate than the change of the intensity.
b. Our sound perception changes at a higher rate than the change of the intensity.
c. Our sound perception changes at a smaller rate than the change of the intensity.
d. Our sound perception changes at a variable rate than the change of the intensity.
Attack systems of pathogenic bacteria.
Sound Localization
Working and Living and Playing in the City Dump of Phnom Penh, Cambodia
The Sun powers on the living systems
Wavelike properties of sound
Bacteriophage site-specific recombination systems