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  1. JFHPELVIEW

    Valve Sound Power Spectrum

    What is the valve controlling. If a gas and in choke condition, peak octave will be 1 to 2 K generally with a 6 to 9 dB drop off/octave as frequency decreases, 3 dB/octave for 4k & 8K. Not sure that this is what you are looking for. For gas under choke condition, valve size, etc. is of minimal...
  2. JFHPELVIEW

    Steam Vent Silencers

    I can help you with this. Need the following information: FLOWRATE IN LB/HR OR SIMILAR RESERVOIR CONDIDITIONS (PRESSURE AND TEMPERATURE) DISTANCE TO MEASUREMENT POINT OR RECEPTOR ANY SPECIFIED LEVEL REQUIRED (AND PLEASE DON'T TELL ME 85 dB-A AT 3 FEET OR 1 METER).
  3. JFHPELVIEW

    Noise reduction in deisel generators

    Have your friend or her attorney contact me at jfhpelview@aol.com
  4. JFHPELVIEW

    Noise map software

    Have not personally used either; however did get a report from SoundPlan about 5 years ago which said that the middle turbine oil cooler (there were 3 engines side-by-side) was approximately 20 dB-A louder than either of the other two. I can tell you from being at the site at the time the sound...

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