How Good Are Noise Reduction Headphones (big Good Ones Like Bose Type) Compared to Ear Plugs at Bloc

You can not beat the Bose type

1. Best point and shoot digital camera for low-light or night photography?

Any current model can take great low light images IF you keep the ISO set to its lowest. That means slowwww shutter speeds and either IS or a tripod or both. Slow processing speed is caused by noise reduction, so turn it off. As for AF, all cameras have problems in low light. Make sure the focus assist lamp is enabled and use manual focus if you have to. Hope this helps.

2. PWM signal to SIM800 MIC noise reduction

The SIM800 has a microphone input. The signal you are getting from the microcontroller will be at too high a level for that input. The SIM800 expects an electret microphone, so maybe 100mV signal level.You need to lower the output level from the PIC-PWM. The following circuit provides a lower cutoff (3KHz instead of the 4.8kHz from your circuit) and about 20dB of attenuation.Change the attenuation by changing R3. A higher value gives less attenuation (louder signal) while a smaller value gives more attenuation (less loud. )Your original circuit has its cut off too high, and provides a much too strong signal for the input of the SIM800.The values for R2 and R3 are approximations. You may need to lower R2 and increase R3. If the volume on the receive side is too low, then you need to increase R3. If it is too loud (and/or distorted) then you need to make R3 smaller.If you make R2 too small, it will begin to change the cutoff of the filter. Try to keep it as high above R1 as possible.simulate this circuit - Schematic created using CircuitLab

3. Via fences for noise reduction of a chip antenna?

The most cited paper on the subject that I could find is PCB design techniques for lowest-cost EMC compliance Part 1 (not free).Though the part you are interested in is succinctly quoted in Best practice in circuit board design:Another technical note repeats this rule of thumb:And gives some good reasons on why would would want to use via stitching/via fences:With respect to your particular application, the WirelessUSB LP/LPstar Tranciever PCB Layout Guidelines state the reasoning more plainly:

4. Sound off on Noise Reduction!

The first noise reduction suite I had experience with was Sound Forge Noise Reduction. Version 1 was pretty lame. Version 2 was much better, quite useable (I still turn to the declicker for problematic clicks occasionally) and I reviewed it for Recording magazine.Subsequently I got the Waves Restoration Suite, and I have used it a lot for various noise reduction tasks. It offers better fidelity than SFNR with some limitations--the declicker seems optimized for vinyl and cannot handle big clicks for example. Recently I got iZotope RX2 (the basic version), and I have been exploring its capabilities. Spectral repair, of course, is something new and I find its ability to deal with discrete sound events within the overall sound picture to be fascinating. The other tools--broadband noise reduction, declick and decrackle, hum removal, a nice parametric EQ, all seem to work very well. For the price, the basic version of RX2 offers a lot of bang for the buck

5. What skullcandy headphones have noise reduction?

The black skullcandy lowrider headphones are noise cancelling. Also the Skullcandy SC-NCL Proletariat. I think all the skullcandy headphones are noise cancelling. I do not know, I may be wrong

6. Noise Reduction - Sound Proofing On Windows

I built window plugs in my Small mix room and record room. Made a small wooden frame, attached a layer of 5/8th gypsum, painted it, put some handles and latches and slid it inside the window sill. Between the window and the plug I filled with insulation and then put a piece of white project board against the glass so It just looks like a window shade is pulled down. Works really well and I can just pop the latches and yank out the plug should I need to get out of the window or move out.Curtains will knock the sound down a little, but mass is what sound proofs a room. The curtains will probably do more to affect the quality of sound inside the room than lower the outside sound intruding.Gearslutz has a really great studio building section. That is where I got all of my information for my studio build from the studs all the way to finish.VO Room without Plug VO Room with plug Mix Room Without Plug Mix Room With Plug