A RECORDING ERROR IN VERBAL CONDITIONING,
Abstract
During studies of verbal conditioning on the three-person group situation, a Grason-Stadler Model E7300M magnetic throat contact microphone to link S to a voice operated relay had been used. During this time, several instances of lowered or zero response rate which could not be accounted for had been observed. Further investigation revealed that this was caused by S turning his head up or away from the side on which the microphone was positioned thus breaking the flat surface contact between skin and microphone. This problem has been eliminated by using a Shure Model T-30-V microphone originally designed for use by wartime pilots. The T-30-V microphone is a low impedance (50-ohm) throat microphone containing two gold plated carbon elements and designed to strap around the neck such that one element is positioned on either side of the throat. It can be readily adapted for use in equipment requiring low impedance input by inserting a standard flashlight cell (1.5 volts) and a 100K-ohm potentiometer between the microphone and the input. (Report quoted in its entirety)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1964
- Accession Number
- AD0603469
Entities
People
- John W. Clark
Organizations
- Arizona State University