1. Sound Notes 2 - Echoes

2. Echo Echo –_____________________________ Ex: _______________________________ Reflection – ________________________ __________________________________ reflected sound wave wood floors vs carpeting bouncing back of wave from a barrier that does not absorb energy (hard surface)

3. Ecolocation some animals use echoes to help them survive. Ex: Bats, _______ Dolphins, _____________ for food. for communication. SONAR; Sound Navigation and Ranging echoes are used to find distant objects.

4. Intensity In the illustration below, sound waves "A" and "B" have the same frequency, so are the same note (or pitch). Sound wave "B," however, has greater amplitude, so is louder than "A.“ Loud sound has a larger amplitude = ________________ Measured in __________ (____) Sound form of energy. Loud sounds ___________________ than soft sounds. have more energy more energy decibels dB