overriding system objectives were not directly considered as this report is intended to identify the tools available to redress noise issues on high noise sources. DoD Source Return on Investment Potential Noise Induced Hearing Loss (NIHL) Cost Reduction Untreated Average (TWA) in decibels, (dB(A)) dB(A) Reduction Service Years Shipboard Diesel Driven Systems 0.2:1 – 4:1 $774,708,120 110 33 40 Shipboard Gas Turbines 0.2:1 - 2:1 $38,509,074 90 8 35 Ships and High Speed Craft 1:1 – 3:1 $49,218,444 97 17 22 Aircraft Carrier Operations- On Deck 203:1 – 509:1 $1,121,310,000 143 13 50 Aircraft Carrier Compartments 37:1 – 44:1 $565,873,000 100 21 50 Tracked Vehicles 0.1:1 – 1:1 $8,125,110,030 113 16 50 Wheeled Vehicles 2:1 – 5:1 $7,958,058,768 90 7 30 Cockpit Noise 0.8:1 – 4:1 $246,473,773 98 12 35 Shipboard Equipment 11:1 – 40:1 $3,889,987,680 95 7 40 The report is available for use by the Defense Department and contractors as a roadmap for future noise control in acquisition. Although none of the engineering solutions presented for the nine noise sources should be construed as a DoD requirement, the process and approaches provided in this report can be applied to any noise source issue. Reducing noise will improve mission readiness, add to quality of work life, support sustainability efforts, and reduce long term costs to the Defense Department and the taxpayer. Noise Source Reduction Concept and Design Plan summaries for each project noise source and the promising technology, as well as, the Final Brief are provided as Appendices to this report.
Per Person Per Career Lifetime System Costs Annual System Costs Audiograms $2,168 $23,848,000 $476,960 Hearing Aids $23,989 $263,879,000 $5,277,580 VA Disability (NIHL) $85,696 $942,656,000 $18,853,120 VA Disability (Tinnitus) $18,604 $204,644,000 $4,092,880 Total $130,457 $1,465,027,000 $28,700,540 Based on the assumed career profile, source levels, crew size and number of systems, the cost algorithm shows a per person per career cost of $130,457, a lifetime cost for all CVN deck crews of $1,230,383,000 and an annual system cost of $24,607,660. 3.4.3 Engineering Noise Control Costs and Return on Investment for On- Deck Aircraft Carrier Operations Engineering treatments discussed in section 3.4.1 were incorporated into the cost analysis presented in section 3.4.2 and engineering treatment ROIs were computed. Input parameters such as system life, number of systems, crew size and career profile were unchanged from section 3.4.2. Table 23 summarizes the engineering noise controls studied, estimated noise reductions, and estimated noise control costs. Table 23 - Engineering Noise Controls for On Deck Aircraft Carrier Operations Treatment Immediate Receiver Space Noise Reduction Lifetime Treatment Per Ship All Ships Low High Low High Partial Barriers 13 dB $200K $500K $2.2M $5.5M Table 24 summarizes the estimated NIHL cost savings with the treatment listed in Table 23. Table 24 - Costs Due to On Deck Aircraft Carrier Operation Noise, Before and After Noise Controls Lifetime System Costs Lifetime Cost Reduction Without Treatments With Treatment Audiograms $23,848,000 $23,089,000 $759,000 Hearing Aids $263,879,000 $211,244,000 $52,635,000 VA Disability (NIHL) $942,656,000 $41,151,000 $901,505,000 VA Disability (Tinnitus) $204,644,000 $68,233,000 $1,36,411,000