Sound Worksheet 2024 Use your notes and/or videos to answer the following questions. 1. Why can a dog hear a sound produced by a dog whistle, while his owner cannot? 2. As aresult of a distant explosion, an observer first senses a ground tremor, then hears the explosion. What accounts for this time lag? 3. Why is the intensity of an echo less than that of the original sound? 4. The frequency of any note produced by a flute will vary slightly with temperature changes in the air. For any given note, will an increase in temperature produce a slightly higher frequency or a slightly lower one a Doppler effect in a ripple tank