The Acoustic Radiation of Line Sources of Finite Length
Finite-length line sources are amenable to analytic treatment only in the far field, but are sometimes proposed for use in the near field. We calculate numerically the behavior of unbaffled and untapered line sources of both monopoles and dipoles over the whole range from near field to far field, in order to provide some graphical data from which general behavior patterns can be deduced to aid design in the absence of suitable formulas. It is found that a smooth flat frequency response both on and off axis requires a monopolar line source used in the extreme far field, which is impractical. In the near field the response becomes irregular, distance-dependent, directional, and not feasible to equalize. The dipolar line source does not appear to be useful for monitoring purposes.
Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!
This paper costs $20 for non-members, $5 for AES members and is free for E-Library subscribers.