Tag Archives: frequency response

Unpacking ETC: Time-domain measurements & early reflections

by James Lindenschmidt Using room testing software to analyze a listening room has become a common practice over the past decade, even for non-professionals. Testing is a very useful tool to understand why our rooms sound the way they do and gives us a lot of information on how to improve the sound we experience […]

Understanding Decay Times and Waterfall Graphs

Decay time waterfall graphs and frequency response charts are tools to measure the acoustics of a room. This article looks to demystify and explain what these graphs and charts really mean. Most of us have seen frequency response charts before – maybe when looking to purchase a new microphone or a new set of speakers. […]

Speaker Boundary Interference Response (SBIR)

SBIR (Speaker Boundary Interference Response) – This is a term to describe how the proximity of a speaker to a hard boundary (wall/ceiling/floor) will change the response, especially in the low end. This is something that not a lot of people understand nor consider when planning a room. Sound radiates from a driver in different […]

What Are Room Modes

Bass trapping first reflections in front of room

Treating Room Modes Room modes are caused by sound reflecting off of various room surfaces. There are three types of modes in a room: axial, tangential, and oblique. Modal activity occurs at frequencies which are directly related to the dimensions of the room. Axial modes are the strongest and many times, the only ones that […]