PHYS 1240 Lecture Notes - Lecture 5: Dynamic Range, Sound Pressure
26 Sep 2018
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Question 1: how long would it take to download at 200 million byte (22 mb) video at 2 million bits/s: 3 min 20 s, 20 min, 800 s, not enough info. Question 2: how big would a 74 minute mono 16-bit 44,100 hz sample be in bytes: 783 million, 392 million, 705,600, 1. 6 billion. Background air pressure is 1 atm = 100,000 n/m^2. ^this creates a sinusoidal graph of pressure over time. Dynamic range- ratio of strongest signal to weakest signal. 8 bit = 2^8 = 256 possible #"s. Bit depth gives the range of possible values on the y axis. The nyquist frequency is the highest frequency that can be resolved. Wavelength of audible sound varies from 17. 2 m to 1. 72 cm.
