Timepiece with improved sound level

A method for improving a sound level of a musical or striking timepiece including a least one vibration generator vibrating at particular natural frequencies of the generator within a range of 1 kHz to 6 kHz, wherein the external parts and/or a movement of the timepiece are modified by integration or addition of at least one radiating element formed by an acoustic radiator including at least one element vibrating-radiating at a natural frequency of the radiator tuned to one of the natural frequencies of the generator, with a frequency difference of less than or equal to the ratio between the natural mode frequency and the inverse quality factor of the radiating element, or with a frequency difference of less than or equal to 100 Hz, and wherein, to determine a number of the acoustic radiators, the method comprises:

• determining a number of modes of vibration of the generating element, formed by the vibration generator which is required to radiate;
• providing the timepiece with the number of radiating elements, each formed by one of the acoustic radiator including at least one vibrating-radiating element, each acoustic radiator being secured to an exterior of a case of the timepiece.

External parts for a musical or striking timepiece, the external parts carrying at least one vibration generator vibrating at particular natural frequencies of the generator,

• wherein the external parts include at least one acoustic radiator including at least one element vibrating-radiating at a natural frequency of the radiator tuned to at least one of the natural frequencies of the generator of the timepiece,
• wherein the external parts include a case enclosing at least one case middle, wherein at least one of the acoustic radiator is secured to the case middle or to the case,
• wherein at least one of the acoustic radiator includes at least one vibrating strip cut from the case middle to which the vibrating strip is connected by a single end of the vibrating strip.