The Development of a Handset for Telephone Stations*
W. C. Jones, A. H. Inglis · Bell System Technical Journal · 1932
A number of factors contribute to the difficulties involved in the design of a telephone handset which gives as good service performance as a deskstand. The handset transmitter, for example, not only is used in a wider range of positions but also is moved much more frequently, so that wider variations are experienced in its characteristics. Further difficulties are introduced by the close physical connection of the receiver and transmitter, in that “howling” tends to be set up. The handset has been developed so that it overcomes all these difficulties and is interchangeable with the deskstand in existing telephone plant without important reaction on either transmission or signaling performance.