In order to give the user some comfort, the material of the cone would have to have been very light indeed. These probably provided better directionality with less ambient noise from handling than most of the other acoustic designs. The problem of concealing such devices prompted some ingenious solutions. It is directed down through the urn's body into the pedestal of the table, where it enters the ear tube. The Acoustic Urn.
Flowers placed in an insert add some realism to the camoflage.
At the opposite pole from concealment is flaunting what you have. Made of brass or even silver, handsomely engraved examples exist that were obviously made to be admired. Rather like a saxophone inserted into a kettledrum, the dome achieved considerable amplification in a small compass. Six Electronics, particularly the transistor, made concealment of aids practical and affordable. Here a binaural aid dating from the 70s encloses all circuitry, including microphones and batteries, in the frames of eyeglasses.