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<blockquote data-quote="Brad Weber" data-source="post: 99133" data-attributes="member: 114">Re: Improving perceived loudness when system is constrained+1, while structureborne noise can be transmitted great distances unless there is sufficient structural damping or a structural break, I would typically expect 630-800Hz to be less likely to be transmitted via the structure and also relatively easy to isolate at the source.Your consultant probably already addressed this but have you confirmed that the noise is directly related to the sound system operation?&nbsp; Many noise control projects I&#039;ve worked on were actually using noise complaints to try to address other issues.&nbsp; More than once I&#039;ve encountered people apparently having trouble selling their property start complaining about noise from adjacent properties only to then suggest the other party purchase their property.&nbsp; I&#039;ve also seen attempts at financial gain, differences in religious or political views or just plain not liking something or someone manifest as purported noise issues.Your consultant probably already addressed these issues as well but is there something that ties you into not adding to the existing ambient level or are the fifth floor tenants only entitled to some accepted standard for ambient noise level?&nbsp; Is the ambient noise level being considered at 2 AM with the windows closed and no A/C running or during the day with A/C and all the other miscellaneous building and other ambient noises?&nbsp; And critical to assessing what may be practical, what is the ambient level in the receiving location and how much reduction are you looking to achieve?&nbsp; Keep in mind that you may need to be at least 10-12dB below the ambient level to not potentially add to the levels.Along the same lines, how much improvement have the treatments already applied made?&nbsp; Were any especially beneficial?&nbsp; Have they gotten you close to an acceptable result or left you about where you started?</blockquote>

[QUOTE="Brad Weber, post: 99133, member: 114"] Re: Improving perceived loudness when system is constrained +1, while structureborne noise can be transmitted great distances unless there is sufficient structural damping or a structural break, I would typically expect 630-800Hz to be less likely to be transmitted via the structure and also relatively easy to isolate at the source. Your consultant probably already addressed this but have you confirmed that the noise is directly related to the sound system operation? Many noise control projects I've worked on were actually using noise complaints to try to address other issues. More than once I've encountered people apparently having trouble selling their property start complaining about noise from adjacent properties only to then suggest the other party purchase their property. I've also seen attempts at financial gain, differences in religious or political views or just plain not liking something or someone manifest as purported noise issues. Your consultant probably already addressed these issues as well but is there something that ties you into not adding to the existing ambient level or are the fifth floor tenants only entitled to some accepted standard for ambient noise level? Is the ambient noise level being considered at 2 AM with the windows closed and no A/C running or during the day with A/C and all the other miscellaneous building and other ambient noises? And critical to assessing what may be practical, what is the ambient level in the receiving location and how much reduction are you looking to achieve? Keep in mind that you may need to be at least 10-12dB below the ambient level to not potentially add to the levels. Along the same lines, how much improvement have the treatments already applied made? Were any especially beneficial? Have they gotten you close to an acceptable result or left you about where you started? [/QUOTE]

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