HW4_2006_Fall - (1) Calculate and plot the TL of the...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Homework 4 Acoustics I 2006, Fall Qt. Due date 11/15, 2006 Problem 1 We want a design analysis for a reactive type muffler to be used for a small automobile. The first-cut model is shown below. Using the 4 pole approach : Figure 1. Simple Expansion Chamber Type Reactive Muffler d=5 cm D=15 cm d=5 cm 30 cm 10 cm 200 o C, 1 atm A B A Engine side For the frequency range between 20 – 3,000 Hz,
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: (1) Calculate and plot the TL of the muffler proper (2) Calculate and plot the approximate insertion loss 10 20log A B Q IL Q = . (3) Discuss the results. Problem 2 Now, we change the design as shown below. All conditions remain the same as Problem 1 except the geometric design change. Calculate and plot the IL. d=5 cm d=5 cm 30 cm 10 cm A B 22 cm 8 cm 8 cm 2 cm Engine side...
View Full Document

Ask a homework question - tutors are online