SPB40 spherical baffles
From Josephson Engineering:
The SPB40A is intended for use only with the Josephson C617SET microphone equipped with the Microtech Gefell MK221 capsule. Using the baffle results in an on-axis boost from 1.5 to 8 kHz, with a maximum of about 2.5 dB at 3.5 kHz, and a smooth variation in high frequency rolloff for sounds arriving off-axis. There is some attenuation of higher frequencies due to the scattering of incident sound, which becomes more pronounced off-axis.
Specs
- Type
- Spherical baffle
- For use with
- Josephson C617SET microphone equipped with the Microtech Gefell MK221 capsule only
- Effect
- On-axis boost from 1.5 to 8 kHz, with a maximum of about 2.5 dB at 3.5 kHz
- Spacing o-ring
- AS3578-211 in Buna-N rubber
Source: Josephson SPB40A spherical baffle sheet (PDF)