Oceans of noise - Whale and Dolphin Conservation Society

Box 1. Characteristics of sound / longitudinal wavesFigure 2.3. A schematic diagram of two sound waves with differing frequencies and wavelengths (_1and _2). Note that each wave has the same the amplitude.1.510.5Pressure00 100 200 300 400 500 600-0.5-1-1.5Time (seconds)Figure 2.4. A schematic diagram of three waves with different phases. Note that all three waves havethe same amplitude, frequency, and wavelength, and the waves represented by the red and black solidlines will cancel each other out, i.e. destructively interfere.1.510.5Pressure00 20 40 60 80 100 120-0.5-1-1.5Time (seconds)14