It is a BS scam that is advertised as a high end energy saving cost effective power consumption reducing technological marvel that can make your life wonderful by saving you so much money. The bouncing needle jiggled the diaphragm at the small end of the horn and the sound waves were amplified as they moved to the large end. At the small end was a diaphragm that vibrated to the sound waves and moved the recording needle. Unfortunately, there were limits on how much sound the small, vibrating diaphragm could generate, and similar limits on how much amplification a cone could provide. The rudiments of electronic recording were there all along. It took a full half century from the time of Edison's invention for the recording industry to go electronic. It's not entirely clear why it took so long. The answer was 'yes', but only through spring and summer. Run your fans counterclockwise (air column down) during the Summer to distribute the cool air around the room, and clockwise (air column up) during the Winter to distribute the hot air around the room from the ceiling and down the walls, recirculating hot air and saving energy during the Winter as well.

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