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Eliminating Microphone Pops When Authoring Audio Wave Files

IP.com Disclosure Number: IPCOM000018814D
Original Publication Date: 2003-Aug-13
Included in the Prior Art Database: 2003-Aug-13
Document File: 2 page(s) / 72K

Publishing Venue

IBM

Abstract

An audio authoring method is disclosed that processes audio files removing microphone pops from them.

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Eliminating Microphone Pops When Authoring Audio Wave Files

System ans Method for Removing "Microphone Pops" from Audio Files

As computers increase in multimedia capabilities, presentations and instructional materials incorporating video and audio files are becoming more prevalent. In the past, multimedia files were created in professional environments with sophisticated recording and editing software and equipment. Now multimedia files are commonly created by personal computer users with relatively unsophisticated equipment, often as little as an inexpensive microphone and sound card.

One of the problems that arises in creating audio files is called a microphone pop. The pop occurs when an excessive burst of air hits the microphone diaphragm. This can occur, for example, in sounding out English phonemes containing the letters "p", "t", and "b". A simple demonstration of a burst can be done by positioning your hand in front of your mouth and saying the word "popping". The resulting burst of air causes overload in a microphone, and results in a loud "thump" sound in the audio file being recorded.

There are currently two solutions for eliminating microphone pops from audio files. The first is to prevent the excessive burst from reaching the microphone diaphragm. This is done by placing a microphone screen between the person speaking and the microphone. It is uncommon for typical users creating audio files to have a microphone screen. The screen, a stand for the screen, and a microphone which must be placed behind the screen result in an awkward and/or expensive solution. The second solution is to eliminate the popping sound from the audio file after it has been recorded, often by using some sound editing software. These sound editors display sound files as a graph of digitally-sampled audio amplitude vs. time. Editors provide the capability to mix files, delete portions of the file, and adjust the amplitude or volume. If the user can identify the portion of the audio file which contains a microphone pop or other undesired sound artifact,...