Important Considerations Before You Start:
* Purpose: What kind of recording are you doing? Indoors, outdoors, dialogue, sound effects? The environment will heavily influence your choices.
* Budget: How much are you willing to spend? DIY saves money, but expect to spend time.
* Weight: Boom poles and blimps can get heavy, especially when extended. Consider your physical strength and endurance.
* Mic Size: The size and shape of your microphone are critical for blimp design. Measure carefully!
* Skill Level: Be honest about your crafting and electronics skills. Start with simpler designs.
* Safety: Use appropriate safety gear (eye protection, gloves) when cutting, drilling, or using power tools.
1. Boom Pole (DIY Options)
Here are several options for building a boom pole, ordered from easiest/cheapest to more advanced:
A. Painter's Pole (Easiest/Cheapest):
* Materials:
* Extending Painter's Pole (Aluminum or Fiberglass): Available at hardware stores. Choose a sturdy one.
* Mic Clip/Holder (Universal or specific to your microphone): Buy online or at a music store.
* Gaffer's Tape or Zip Ties: For securing the mic clip.
* Foam Padding or Grip Tape (optional): For a more comfortable grip.
* End Cap (optional): To prevent scratching the floor and improve appearance.
* Construction:
1. Extend the Pole: Extend the painter's pole to your desired length. Test its stability at full extension.
2. Attach Mic Clip: Use gaffer's tape or zip ties to firmly attach the mic clip to the end of the pole. Make sure the mic is securely held.
3. Add Grip (Optional): Wrap foam padding or grip tape around the handle section for a more comfortable and secure grip.
4. Add End Cap (Optional): Place an end cap at the base of the pole.
* Pros: Very inexpensive, readily available, quick to assemble.
* Cons: Can be wobbly at full extension, not specifically designed for audio, may transmit vibrations. Aluminum poles can conduct electricity, which is dangerous near power lines.
* Tips:
* Choose a pole with a locking mechanism to prevent collapsing.
* Wrap the pole with foam to dampen vibrations.
* Consider painting it black to reduce reflections.
B. PVC Pipe Boom Pole (More Rigid, Requires Gluing):
* Materials:
* PVC Pipe (Various lengths and diameters): Schedule 40 PVC is a good balance of strength and weight.
* PVC Couplings/Connectors: To join pipe sections (if needed). Consider a threaded connection for easy disassembly.
* Mic Clip/Holder (as above)
* PVC Primer and Glue: For permanent connections.
* Gaffer's Tape or Zip Ties: For securing the mic clip.
* Foam Padding or Grip Tape (optional)
* End Cap (optional)
* Construction:
1. Cut and Assemble PVC: Cut PVC pipe sections to your desired lengths. Use PVC couplings to join sections together. Consider threaded couplings for easier transport.
2. Prime and Glue (If Permanent): If you want a permanent boom pole, prime and glue the PVC connections. Allow to dry completely.
3. Attach Mic Clip: Use gaffer's tape or zip ties to firmly attach the mic clip to the end of the pole.
4. Add Grip (Optional): Wrap foam padding or grip tape around the handle section for a more comfortable and secure grip.
5. Add End Cap (Optional): Place an end cap at the base of the pole.
* Pros: More rigid than a painter's pole, customizable length, relatively inexpensive.
* Cons: Requires cutting and gluing, can be bulky, may transmit vibrations, not easily adjustable in length (unless using telescoping sections and clamps).
* Tips:
* Use thicker-walled PVC for greater rigidity.
* Sand PVC edges to remove burrs.
* Consider using a PVC pipe cutter for clean, straight cuts.
* Fill the PVC pipe with sand or foam for better vibration dampening
C. Aluminum Tubing Boom Pole (Strongest, Most Professional, Most Expensive):
* Materials:
* Aluminum Tubing (Telescoping sections, various diameters): Find at metal suppliers or online. Look for thin wall aluminum.
* Telescoping Clamps/Locks: To secure the tubing at different lengths. Search for "telescoping tubing clamps" or "quick-release clamps".
* Mic Clip/Holder (as above)
* Rivets or Screws: For attaching clamps.
* Drill: For drilling rivet/screw holes.
* Foam Padding or Grip Tape (optional)
* End Cap (optional)
* Construction:
1. Cut and Fit Tubing: Cut the aluminum tubing sections to the desired lengths, ensuring that each section telescopes smoothly inside the next larger section.
2. Attach Clamps: Drill holes in the aluminum tubing and attach the telescoping clamps using rivets or screws. Make sure the clamps are secure and easy to operate.
3. Attach Mic Clip: Use gaffer's tape or a custom-made bracket to firmly attach the mic clip to the end of the pole.
4. Add Grip (Optional): Wrap foam padding or grip tape around the handle section for a more comfortable and secure grip.
5. Add End Cap (Optional): Place an end cap at the base of the pole.
* Pros: Strong, lightweight, easily adjustable length, looks more professional.
* Cons: More expensive materials, requires more skill to build, can still transmit vibrations.
* Tips:
* Use high-quality telescoping clamps for a secure and reliable lock.
* Deburr the cut edges of the aluminum tubing to prevent scratching.
* Add rubber washers between the tubing sections to reduce vibration.
* Powder coat or paint the aluminum for a more professional finish.
2. Blimp (Microphone Shock Mount and Wind Protection)
The blimp serves two purposes: isolating the mic from handling noise and protecting it from wind. Here are DIY options:
A. Plastic Bottle Blimp (Very Basic):
* Materials:
* Two Plastic Bottles (Different sizes, one slightly larger than the other, clear or opaque). Think soda bottles.
* Scissors or Utility Knife
* Foam or Sponge Material (For internal padding)
* Rubber Bands or Gaffer's Tape
* Mic Clip or Elastic Bands
* Construction:
1. Cut Bottles: Cut the bottoms off both bottles. The larger bottle will be the main blimp body, and the smaller bottle will form part of the handle. You may also need to cut the neck off the smaller bottle to fit better.
2. Create Suspension: Using elastic bands, or by carefully drilling small holes and using string, suspend the mic clip (or use elastic bands directly) *inside* the larger bottle. Ensure the mic is centered and doesn't touch the bottle walls. This is your shock mount.
3. Add Padding: Line the inside of the larger bottle with foam or sponge to further dampen vibrations and reduce noise.
4. Join Bottles: Slide the smaller bottle (handle) into the open end of the larger bottle. Secure with rubber bands or gaffer's tape.
* Pros: Extremely cheap, uses readily available materials.
* Cons: Very basic wind protection, minimal shock isolation, looks unprofessional, potentially flimsy.
* Tips:
* Experiment with different bottle sizes and shapes.
* Use thicker foam for better vibration dampening.
* Cover the outside of the blimp with fabric or foam to reduce noise.
B. Wire Mesh and Fabric Blimp (Better Wind Protection):
* Materials:
* Wire Mesh (Hardware cloth, chicken wire - fine mesh is better). Enough to form a cylinder slightly larger than your mic.
* Fabric (Acoustically transparent material like speaker cloth, thin felt, or fleece).
* Foam or Sponge Material (For internal padding and shock mounting).
* Mic Clip or Elastic Bands
* Wire Cutters
* Needle and Thread or Hot Glue Gun
* Plywood or Plastic Disks (For the ends, optional).
* Construction:
1. Form Wire Mesh Cylinder: Cut and shape the wire mesh into a cylinder that's slightly larger than your microphone. Secure the edges with wire or by bending them over.
2. Cover with Fabric: Sew or glue the fabric over the wire mesh cylinder. Make sure the fabric is taut but not stretched too tightly.
3. Create Suspension: Inside the cylinder, suspend the mic clip (or use elastic bands) as in the previous example, ensuring the mic is centered and doesn't touch the mesh or fabric.
4. Add Padding: Line the inside of the cylinder with foam to further dampen vibrations.
5. End Caps (Optional): Cut circular disks from plywood or plastic to cover the ends of the cylinder. Cover the disks with fabric and attach them to the cylinder.
* Pros: Better wind protection than the plastic bottle blimp, can look more professional.
* Cons: Requires more materials and effort, can be challenging to create a perfect cylinder shape.
* Tips:
* Use multiple layers of fabric for better wind protection.
* Experiment with different fabric types to find one that's acoustically transparent.
* Ensure the mic is securely suspended to minimize noise.
C. Advanced DIY Blimp (Using a Basket):
* Materials:
* Wire Basket (Metal or plastic, large enough to house the microphone with space for suspension).
* Acoustic Foam (For lining the basket).
* Soft Fabric (Acoustically transparent, for covering the basket).
* Elastic Cord or Suspension System.
* Handle (PVC pipe or similar).
* Mic Clip/Mount.
* Zip Ties or Adhesive.
* Construction:
1. Prepare the Basket: Line the inside of the basket with acoustic foam to reduce internal reflections.
2. Create the Suspension System: Design a suspension system using elastic cord or a similar material to hold the microphone. The mic should be suspended in the center of the basket, not touching the sides.
3. Attach the Mic Clip: Secure the mic clip to the suspension system, ensuring it's stable and doesn't transmit vibrations to the basket.
4. Cover the Basket: Cover the basket with acoustically transparent fabric, securing it with zip ties or adhesive. Make sure the fabric is taut but not too tight.
5. Attach the Handle: Attach a handle to the basket for easy holding and maneuvering. This can be done with screws, zip ties, or adhesive.
Key Considerations for Blimp Design:
* Acoustic Transparency: The material covering the blimp *must* be acoustically transparent, meaning it doesn't significantly alter the sound of the microphone. Test materials before using them.
* Suspension: The suspension system is critical. It isolates the mic from vibrations. Use elastic materials and ensure the mic doesn't touch the blimp housing.
* Size: The blimp should be large enough to provide adequate wind protection but not so large that it becomes unwieldy.
* Weight: Keep the blimp as lightweight as possible to reduce fatigue.
* Access: Consider how you'll access the microphone inside the blimp to adjust settings or replace batteries.
3. Windscreen (For Milder Wind Conditions)
A windscreen is a simpler solution for light breezes. It goes directly on the microphone.
A. Foam Windscreen:
* Materials:
* High-Density Open-Cell Foam (Microphone foam is ideal, but craft foam can work).
* Scissors or a Sharp Knife
* Template (Optional, use your microphone as a guide).
* Construction:
1. Cut Foam: Cut the foam into a shape that will fit snugly over your microphone. You can use a template or simply freehand it. Leave extra length for the back.
2. Hollow Out: Carefully hollow out the inside of the foam to create a cavity for the microphone. Make sure the foam is thick enough to provide adequate wind protection.
3. Test Fit: Test fit the windscreen on your microphone. Adjust the size and shape as needed.
* Pros: Simple, inexpensive, lightweight.
* Cons: Limited wind protection, can affect sound quality if the foam is too dense.
* Tips:
* Use a sharp knife for clean cuts.
* Experiment with different foam densities to find the best balance of wind protection and sound quality.
* A conical or cylindrical shape works well.
B. Furry Windscreen (Deadcat/Deadkitten):
* Materials:
* Faux Fur Fabric (Long-haired, dense fur is best).
* Elastic Band or Drawstring
* Needle and Thread or Hot Glue Gun
* Template (Optional, use your microphone as a guide).
* Construction:
1. Cut Fur: Cut the faux fur fabric into a shape that will wrap around your microphone. Leave extra length for the back.
2. Sew or Glue: Sew or glue the edges of the fur together to form a tube or pouch.
3. Add Elastic: Attach an elastic band or drawstring to the back of the windscreen to secure it to the microphone.
4. Test Fit: Test fit the windscreen on your microphone. Adjust the size and shape as needed. Trim excess fur.
* Pros: Excellent wind protection, relatively easy to make.
* Cons: Can be bulky, may shed fur, can affect sound quality if the fur is too dense or long.
* Tips:
* Use high-quality faux fur for better wind protection and durability.
* Trim the fur around the microphone capsule to minimize sound coloration.
* Ensure the elastic band is snug but not too tight.
General Windscreen Tips:
* Size: The windscreen should be large enough to cover the microphone capsule completely.
* Density: Choose a material that's dense enough to block wind but not so dense that it muffles the sound.
* Fit: The windscreen should fit snugly on the microphone to prevent wind from getting inside.
* Maintenance: Clean your windscreen regularly to remove dust and debris.
Testing and Refinement:
* Record Test Audio: The most important step! After building any of these, record test audio in various conditions (quiet indoors, windy outdoors). Compare the sound with and without your DIY equipment. Listen for noise, vibration, wind interference, and changes in sound quality.
* Make Adjustments: Based on your test results, adjust your design. Add more padding, change materials, tighten connections, etc.
* Iterate: DIY is an iterative process. Don't be afraid to experiment and refine your designs until you achieve the desired results.
Where to Find Materials:
* Hardware Stores: Painter's poles, PVC pipe, aluminum tubing, clamps, foam, end caps.
* Fabric Stores: Speaker cloth, felt, fleece, faux fur, elastic.
* Online Retailers: Microphone clips, suspension systems, specialized foam, aluminum tubing, telescoping clamps.
* Thrift Stores: Baskets, fabric scraps.
By carefully planning, gathering the right materials, and taking the time to build and test your DIY gear, you can create a functional and cost-effective boom pole, blimp, and windscreen. Good luck!