The fur over foam system performed surprisingly well, however the Q3 frequency was substantially lower than for the cloth-covered blimp (see the frequency response spectra). Fur-covered blimp (dead cat) = -25 dB relative to naked mic. Hole guide. You can follow any responses to this entry through the RSS 2.0 feed. I have also used 55 mm diameter PVC for a smaller microphone, but installation of the mic into that narrow tube was more difficult. Deadcats really do improve your microphone's audio quality. When covered with fur, it looks like a dead cat. Change ), Ever cooler – replacing and upgrading fans in an Evakool fridge, Robust automatic jitter and smoothed bootstrap in R, Ever cooler – replacing and upgrading fans in an Evakool fridge, Zomei resin neutral density filters tested. Perhaps there are other acoustically transparent cloths that are easier to work with. Change ), You are commenting using your Facebook account. The fur-covered blimp is best for “strong wind”. I left some plastic at the bottom of the tube for the grip. Fur over foam windscreen and microphone in shock mount = -20 dB. In video productions, microphones are often covered with a synthetic fur cover that’s commonly referred to as a “dead cat” or “windmuff.” The hairs block wind from hitting the microphone, greatly reducing the amount of wind noise that gets recorded. A microphone blimp (or zeppelin) looks like an airship. A comparison of blimps and dead cats that will fit a Sennheiser ME66 microphone. The fur will hide bad sewing. Wind protection set-ups ordered from weakest wind noise level (best) to strongest (worst) are: Wind noise waveforms for fan source and different wind protection set-ups. Wind protection set-ups ordered from widest (best) to narrowest (worst) bandwidth are: Frequency responses for different wind protection setups and dry newspaper sheets source. Measurements were made using Raven Pro 1.3 from 16 bit, 44.1 kHz recordings. In the video above, Nate Taylor of Taylor’d Photographyshows … After building my own shock mounts, I wanted better wind protection. As more holes are drilled you will no longer hear any effect. Fur over foam windscreen and microphone in shock mount. My home-made blimp and dead cat is lightweight and cost about AUD$30 in materials. Building a blimp. cloth-covered blimp) for higher signal levels and wider bandwidth. This is a prototype and the sewing is a mess! The third graph compares wind noise levels. The second graph compares signal levels. Sony is Selling the a7R for $200 Instead of $1,900, This Guy Watercooled His Canon R5 and Unlocked Unlimited 8K, Canon 2021 Lens Roadmap Leaked: 16 New RF Lenses On the Way, Dr. Seuss Goes After Photographer Over Grinch-Themed Photo Shoot, Nikon’s Online Classes Are All Free for the Holidays, 20 Composition Techniques That Will Improve Your Photos. An easier solution is to wrap the cloth around the blimp and secure it with rubber bands. A blimp and dead cat delivers good signal levels, fidelity and wind resistance. This comparison shows very poor wind protection from this foam windshield. The (optional) cloth is made from leftover material from a light diffuser project. I will not use the fur over foam system because the signal level and bandwidth were lower than for other set-ups. I cut the PVC to length and drilled it nearly full of holes with a 16 mm diameter hole saw. For news recording and like, there is no second chance. I contact-glued some rubber (recycled bicycle inner tube) to the inside of the “H” pieces to prevent slipping and squeaking. It is secured with velcro (hook-and-loop) after stretching the material tight. If you’d like to use the same technique for your own casual projects, you can make a DIY dead cat for your camera for less than $2. I made three recordings for each set-up and compared median spectra and third-quartile (Q3) frequencies. So here a video to help you out! The blimp creates a volume of still air around the microphone. I used a permanent marker to mark the tube where the rubber bands pass, for whenever they have to be replaced. The large holes are aligned with a row of holes on the PVC tube. The microphone cable passes outside the rear cap. Use a thread that contrasts with the fur. This comparison shows that fur coverings more strongly absorb higher frequencies. Fur provides a better wind barrier than cloth because the fibres move and absorb wind energy. The forward half is slipped over the blimp and the rear half has a zipper. A good wind protection system will have a frequency response and signal level close to the naked mic and much lower wind noise levels. Measurements were made using Raven Pro 1.3 from 16 bit, 44.1 kHz recordings. I also sawed off the base of the caps, leaving about 10 mm to grip the tube. Some manufacturers claim that their expensive fur is acoustically transparent. To compare frequency responses, I created broad spectrum noise by crumpling dry sheets of newspaper. Foam windscreen and microphone in shock mount. The fur over foam windscreen gave a substantially weaker signal. 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Beware of denser furs, that can strongly attenuate the acoustic signal. Waveforms from Audactiy 2.0.6. My pistol grip is secured with a wing nut (the bolt is threaded into the tube). Larger diameters and dead air space will better attenuate wind noise but larger, heavier blimps are increasingly difficult to handle. These tests illustrate the trade-off between signal strength and fidelity versus wind noise reduction. To compare wind noise levels, I simulated wind using a pedestal fan. A blimp and dead cat delivers good signal levels, fidelity and wind resistance. … High sensitivity microphones in the field need protection from both shocks and wind. Blimp with fur covering. Disadvantages for the blimp/dead cat are the bulkier size and slower microphone installation. When covered with fur, it looks like a dead cat. Fur over foam windscreen and microphone in shock mount = -4 dB. Good luck! Underneath the rear of the tube I have made a large hole where I can access the switch on my microphone. I used another hole saw to drill out the ends of the caps. The light foam windshield is best for indoors, but hopeless for wind. ( Log Out / Wind protection set-ups ordered from highest (best) to lowest (worst) are: Signal-to-noise ratios for different wind protection set set-ups and the conditions in the preceding two graphs. For high fidelity recording, I suggest to have all three wind protection systems in the field bag and to select the one appropriate to the conditions. After building my own shock mounts, I wanted better wind protection. You can leave a response, or trackback from your own site. Fur-covered blimp (dead cat). Round hole saws are necessary, because large drill bits make a mess in thin plastic. See my earlier shock mount post for a simpler, fixed pistol grip handle. Cutting away more plastic makes the blimp lighter and the tube acoustically transparent. I compared mean levels averaged over about 60 seconds of playback. Fill in your details below or click an icon to log in: You are commenting using your WordPress.com account. Change ), You are commenting using your Google account. The frequency response spectra were rough, but signal levels were more repeatable than for the newspaper sheets. I made a hole guide out of a thin steel sheet. If you’d like to use the same technique for your own casual projects, you can make a DIY dead cat for your camera for less than $2.
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