Acoustic radiating membrane arrangement for a striking watch

摘要

There is provided an acoustic radiating membrane arrangement for a striking or musical watch. The arrangement includes a first membrane arranged superposed on a second membrane. Peripheral edge portions of the two membranes are intended to hold the membranes inside a watch case. The first acoustic radiating membrane is configured to radiate efficiently the frequencies in a first frequency band. The second acoustic radiating membrane is configured to radiate efficiently the frequencies in a second frequency band that is different from the first frequency band. A spacer ring is also disposed between the peripheral edge portions of the first membrane and of the second membrane to define an acoustic cavity.

主权项

1. An acoustic radiating membrane arrangement for a striking or musical watch, the arrangement including a first membrane arranged superposed on a second membrane, a first peripheral edge portion of the first membrane and a second peripheral edge portion of the second membrane being intended to hold the membranes inside a watch case,
the first acoustic radiating membrane being configured to radiate efficiently the frequencies in a first frequency band, and the second acoustic radiating membrane being configured to radiate efficiently the frequencies in a second frequency band that is different from the first frequency band, wherein a spacer ring is disposed between the first membrane and the second membrane to define a cavity between the two membranes, which is tuned to at least one of the two natural vibration frequencies of the two membranes.