Looking for Device to Boost Sound from a Home-Secu

Hi,

The speaker on our home security system emits a very high-pitched, low-volume sound which I cannot hear well, and there's no way to adjust the sound. I was wondering if there are any devices that, for example, have a microphone and speaker and can be placed next to the main speaker to amplify the original speaker's sound. Or some other solution.

Any ideas or products you know of?

Thanks,
Bill