Laserfiche WebLink
- Altermatt Associates. Inc. <br />-- Consultants in Acousrics <br />July 21, 1998 <br />Arbuckle Costic Architects <br />363 State St. <br />Salem, OR 97301-3533 <br />Attention: Mr. Leonard Lodder <br />Re: Courthouse Square, Salem, OR <br />Bus Noise and Vibration Isolation <br />Dear Mr. Lodder: <br />iRBUCK~E COS ~ ~ <br />JUL 2 9 1998 <br />~F~~I\/F~ <br />Proposal 98153 <br />This letter is written to outline tasks and propose fees to provide acoustical consulting services <br />for the referenced project. The project is- a commercial building adjacent to a bus transfer mall <br />to be located in Salem, Oregon. The tasks of this project are understood to invo!ve evaluating <br />the isolation and recommending modifications for control of 1) bus noise from mall to the <br />interior building spaces, and 2) bus vibration from the bus mall to the general building <br />structure. <br />The following tasks are expected. <br />A. SCOPE OF WORK <br />1. Design <br />1.1 Source Sound Measurement <br />~ <br />For the most accurate analysis, sound level measurements of the bus noise should be <br />made. In that the sound isolating characteristics of building structure va:y with <br />frequency, this information will allow the most accurate evaluation of the currently <br />planned structure, and potential modifications. Measurement of bus noise for idle and <br />acceleration would be made in octave bands from 31.5 Hz to 8000 Hz. <br />1.2 Analysis and Recommendations <br />1.2.1 Using the data of 1, a determination would be made of the sound isolation requirements <br />of the exterior walls adjacent to the bus transit mall. <br />COM\98153P <br />522 SW Fifth Avenue, Suite 1200 Portland, Oregon 97204 (503) 221-1044 Fax: 221-1445 <br />