At our meeting on 18th February 2020 our Chairman Barrie Gibbard passed on his experience of attaching and hiding a Lavalier microphone when capturing audio on a film shoot. We attached Lavalier microphones to two members in an interview situation. The interview was filmed by members and recorded on a Zoom F8 digital recorder using the two Lavalier microphones as well as a boom microphone as a backup and which also may be used to provide a source of ambient background. At our next meeting on 25th February Barrie will demonstrate how to adjust and mix the audio recordings he captured in post production so as to produce a film with the best audio.
Barrie introduced and demonstrated the idea of a "Moleskin Sandwich" and its use with "HBG Tape" and "3M Transpore Tape" which are all available from Amazon (see details below).
Making the Sandwich
You will need some scissors and maybe a helpful assistant! First create a "Moleskin Sandwich around the Lavalier Microphone with the top cover and clip removed. To avoid a residue being left around the microphone when you remove the moleskin it is recommended that you place a small piece of the Transpore surgical tape around it before making the sandwich which comprises two pieces of moleskin - a small and large piece.
- Optimum location of a Lavalier is just above third button down on a shirt. This means that its distance from the mouth is roughly the same whether the person is looking right, straight ahead or to the left.
- Create the Moleskin sandwich on the microphone as shown in the picture.
- Ideally, to avoid leaving a residue on the clothing, place a section of Transpore tape on the clothing where the microphone is to be mounted. Then attach the sticky Moleskin Sandwich to the Transpore tape on the "clothing" or in this case the tie (see picture).
- Attach two pieces of HBG double sided tape one above and one below the Moleskin Sandwich so that when the top of the tie is pressed to the tail of the tie they become one. This avoids movement of the two surfaces relative to one another causing microphone interference.
- Similarly create a cable "Isolation loop" as close to the lavalier as possible so that any movement or stress in the cable is not transferred to the Lavalier microphone.
- Tidy up any spare cable and tuck it away near to the transmitter.
Must have items
- Double sided tape: for sticking together layers of clothing or use instead of Rycote ‘stickies’ as a base for under/over covers: HBG Hypoallergenic Double Sided Transparent Toupee/Wig/Dress/Body Adhesive Tape (25mm) 5 meters in length Single Pack can be obtained from Amazon.
- Transpore surgical tape: use as protection layer or instead of moleskin to prevent gluey residue on fine clothing. 3M Transpore Surgical Tape, Hypoallergenic, Transparent, 2.5cm x 9.1m, Pack of 1 also available from Amazon.
- Moleskin: for ‘moleskin sandwich’. Profoot Moleskin - Pack of 2 also available from Amazon.
- Scissors and Fingernails to remove backing!
Useful Youtube tutorials
Voice technologies: https://www.youtube.com/playlist… - these are a really excellent series of tutorials on placing lavalier microphones. A bit focussed around the VT products, but the principles apply to any.
Deity microphones: https://youtu.be/ckSiYcX6HT8 - another fairly useful video.
Curtis Judd: https://www.youtube.com/playlist… - a great source of information generally across the Curtis tutorials including an excellent series (paid for) on the Zoom F8n recorder.