Microphone-Related Audio Engineering Society Preprints And Journal Articles 

By Bruce Bartlett, Crown International

Tonal Effects of Close Microphone Placement 
The effect of microphone placement on reproduced tonal balance is investigated for acoustic guitar, piano, electric guitar amplifier, and voice. The data presented are based on spectral measurements in various microphone locations and listening tests.
Preprint Number: 1782 Convention: 69 1981-05 
AES Journal Vol:Issue: 29:10 Page: 726 Year: 1981 

Tonal Effects of Classical Music Microphone Placement 
The spectrum of a symphonic band playing in a concert hall was measured in the audience seating area. It was also measured close to the band, in several locations typically used for recording. These measurements were repeated with an orchestra. 
Preprint Number: 1994 Convention: 74 1983-10 

Testing Microphones with Time Delay Spectrometry 
There is a new, cost-effective and efficient way to measure microphones: Time Delay Spectrometry (TDS). An example of a TDS measurement facility is described. Topics covered are TDS theory, test-room design, test procedures, measurement examples.
Preprint Number: 2133 Convention: 76 1984-10 

Microphones: Small is Beautiful 
Recent years have seen the introduction of miniature condenser microphones with performance comparable to larger studio microphones. In fact, compared to large microphones, small microphones (1 cm diameter or less) have several advantages ...
Preprint Number: 2393 Convention: 81 1986-11 
Author: Bruce Bartlett 

A High-Fidelity Differential Cardioid Microphone 
Many musicians need a handheld vocal microphone with superior gain-before-feedback and isolation from ambient sounds. A new differential cardioid microphone was developed to meet these needs without sacrificing fidelity. This paper discusses design goals ...
Preprint Number: 2713 Convention: 85 1988-11 

An Improved Stereo Microphone Array Using Boundary Technology: Theoretical Aspects 
Conventional microphone arrays for true-stereo recording have a number of shortcomings. To improve upon these, a new stereo microphone array using boundary technology has been developed: the Stereo Ambient Sampling System. This paper examines operating principles...
Preprint Number: 2788 Convention: 86 1989-03 
AES Journal Vol:Issue: 38:7/8 Page: 543 Year: 1990 
Bruce Bartlett and Michael Billingsley 

Practical Field Recording Applications: An Improved Stereo Microphone Array Using Boundary Technology 
A new application of boundary technology makes possible a stereo microphone with highly accurate spatial localization. The Stereo Ambient Sampling System also captures the acoustic "atmosphere" with great detail, free from the usual phase-error induced ...
Preprint Number: 2791 Convention: 86 1989-03 
AES Journal Vol:Issue: 38:7/8 Page: 553 Year: 1990 
Michael Billingsley and Bruce Bartlett 

Differential Head-Worn Microphones for Music 
Many musicians need a head-worn microphone with good sound quality, superior gain before feedback, and isolation from ambient sounds. Recently, a differential microphone has been designed to meet these needs. This paper discusses the design goals, choice of polar patterns, ...
Preprint Number: 3872 Convention: 97 1994-11 

Loudness Compensation by Microphone Frequency Response and Microphone Placement 
Rock bands produce high SPLs when heard live. But recordings of these bands are reproduced at much lower SPLs. Consequently, the reproduction may sound weak in the bass and treble compared to the live band. Some microphones compensate for this loss: they boost the lows with proximity effect (and nearfield placement) and boost the highs with a 'presence peak.' These microphones are often chosen as being the 'best sounding' for recording loud instruments. The author suggests a new specification that quantifies this compensation. 
Preprint Number: 4517 Convention: 103 1997-09 

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