P11221: Noise Reduction for Internal Combustion Engine


Project Summary Project Information


Lawnmower Engine

Lawnmower Engine

The auto industry is currently increasing the focus on the reduction of noise emitted from an internal combustion engine. For consumer vehicles it is largely an issue of comfort and convenience but for performance competitions with noise restrictions and requirements, such as the SAE Formula competition, it can be an issue of meeting competition requirements while limiting performance degradation. The focus of this project is to develop an active, passive, or hybrid mechanical and/or electrical noise attenuating system with minimal engine performance degradation.

Project Readiness Package

1-page Project Summary


The original scope of the project was to create a noise dissipation system for the Formula SAE car. The logistics of coordination and implementation was determined too eager, so a Briggs and Stratton lawnmower engine will be used.

The project explored absorption type mufflers for the lawnmower engine and a resonator demonstration module. Both of these systems were presented at the ImagineRIT fair May 7, 2011.

The ANC system was investigated by another Senior Design Team (P11227).


Project is closed and considered a success. Follow on projects are encouraged to familiarize themselves with important project reference materials including the Technical Paper and Test Reports as well as the "ANC Packet", all of which can be found below. Further questions can be directed to Christopher Morehouse at csm9555@rit.edu through the fall quarter of 2011.

Project Name
Noise Reduction for Internal Combustion Engine
Project Number
Vehicle Systems and Technologies
Start Term
End Term
Faculty Guide
Ed Hanzlik
Faculty Consultants
Ed Hanzlik
Dr. Alan Nye
Graduate Teaching Assistant
Mr. Jagdish Tandon
Primary Customer
Dr. Alan Nye
Team Members
Chris Morehouse
Julie Maier
Ted Zachwieja
Caroline Bills
Main Documents Project Sections Senior Design I Senior Design II

Important Documents:

Preliminary WBS

Project Breakdown

Customer Needs & Engineering Specifications

The Plan

Risk Assessment

Concept Screening Matrices

Preliminary Bill of Materials

Team Documents:

Team Members Overview

Team Values and Norms

Further Material:

Reference materials

Photo Gallery

Design Options:



Resonator Theory

Resonator Demo

Sound Data:

Formula SAE Car

Briggs & Stratton

Frequency Generator





System Design Review:

Pre-Review Info Packet


Notes from Review

Action Items List

Detailed Design Review:

Preliminary Agenda

Pre-Review Info Packet


Notes from Review

Action Items List

Managerial Design Review:


Action Items List (11.19.10)

Revised Action Items List (2.17.11)

Solid Models & Manufacturing:

Absorption Muffler Models

Absorption Muffler Manuf. Plan

Resonator Demo Models


Test Procedures

Test Data & Results

Test Reports

ASME Competition:


Judging Criteria

Technical Conference Publication:

Technical Paper Outline

Technical Paper

Poster Publication:

Project Poster

Week 10 Project Review:

Project Review Presentation