**In this unit students explore and develop proficiency in creating and using models to understand reflection, absorption, and transmission of sound, a type of matter wave. Students will engage in five lessons. In Lesson One students conduct research and develop empathy around noise-induced hearing loss, or NIHL, to understand the effects of sound intensity on hearing. Lesson Two explores transmission, absorption, and reflection of sound within written scenarios and through modeling different “Noise Capsules.” In Lesson Three, students focus there learning on sound transmission through various materials by building sound boxes. Students use reflection in Lesson Four to gain first-hand experience with echolocation. The unit culminates with a design challenge in Lesson Five, where students demonstrate proficiency for the concepts of reflection, absorption, and transmission of matter waves by designing, building, and testing a noise cancelling device.**

**Educational outcomes**

- Lesson One – Learn about sound intensity and its effects
- Lesson Two – Develop and use noise capsule models to describe transmission, absorption, and reflection of sound by various materials
- Lesson Three – Develop and use sound box models to explore transmission of sound through various materials
- Lesson Four – Use a model to experience the reflection of sound off various materials to locate objects
- Lesson Five – Develop and use a model to determine and then present how to minimize the effects of excessive noise on NIHL for local residents

**STEAM INTEGRATION**

Lesson One requires students to measure sound intensity, which is directly related to sound wave transmission (MS-PS4-2). Lessons 2-4 involve the development of models from various materials to explore and analyze the transmission, reflection, and absorption of sound (science and engineering). This allows for an exploration of material properties similar to investigating a medium used by an artist. Lesson Five requires students to apply all learning from previous lessons to develop and test a model in order to answer an inquiry question and then present the results to make a recommendation for ways people can protect themselves from NIHL (SL.8.5).