🔇 ASTM E477 (Dynamic Insertion Loss dB across 63Hz-8kHz, Airflow ΔP "WC)

HVAC Duct Silencer Sizing Calculator

Size dissipative and packless rectangular and circular duct silencers (IAC Acoustics / Ruskin) under ASTM E477: calculate dynamic insertion loss (dB sound attenuation across 63 Hz to 8,000 Hz octave bands meeting Room Criterion RC 30 / NC 35 noise criteria), calculate airflow regenerated self-noise, static pressure drop ("WC), and acoustic engineering profits.

1. Project & Operating Inputs

Duct Silencers Installed (Silencer Count e.g. 14 Supply & Return Silencers)

Target Sound Attenuation (dB @ 250Hz e.g. 22.0 dB Mid-Frequency Loss)

Customer Bid Price for Supplied & Flanged Silencer Units ($ / Unit)

IAC Rectangular Silencer, Perforated Baffles, Mylar Vapor Barrier & Tech ($)

2. Financial Breakdown & Yield

ASTM E477 DUCT SILENCERS

Turnkey HVAC Silencer Package Profit

Acoustic Noise Control Contractor Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost