No person shall use or operate any facility, machine or instrumentality, or produce or cause to be produced any sound in the Town, when the same shall produce noise, the sound-pressure level of which measured at the point of annoyance complained of shall exceed 65 decibels between the hours of 8:00 a.m. and 8:00 p.m. or 50 decibels between the hours of 8:00 p.m. and 8:00 a.m., or that which shall be more than 10 decibels above the existing background sound level, as measured on the A-weighting of a sound-level meter which conforms to the specifications of the United States of America Standards Institute. The "background sound level" is defined as the sound level present when the offending noise source is silenced. In no instance, however, shall it be necessary to reduce the noise level below 40 decibels between the hours of 8:00 a.m. and 8:00 p.m. or 30 decibels between the hours of 8:00 p.m. and 8:00 a.m. This section is applicable when and where the character and nature of any sound or noise lends itself to measurement, but nothing in this section shall be construed in any way to limit any other portion or part of this article.