Commercially sold dipole surrounds were not acoustically true dipoles
Evidence
A true dipole has no separation of the opposite polarity radiating surfaces, as in front and back of a diaphragm or thin film radiating surface. These were not true dipoles. — Toole, Floyd E, Sound reproduction- the acoustics and…, 826
Categorization
Category: Definitional Content
- DEFINE: Clarifies the technical definition of a true dipole versus the commercial bidirectional out-of-phase arrangement.
Related
- THX dipole surrounds were bidirectional out-of-phase pairs, not true dipoles (similarity 0.89)
- Bipole but not dipole designs give surround channels needed coverage (similarity 0.84)
- Bipole surround loudspeakers radiate hemispherically to deliver similar direct sound to all listeners (similarity 0.81)
- THX-type dipole surrounds produced irregular mid-frequency depressions, not neutral nulls (similarity 0.80)
- THX dipole surround speakers degraded direct sound while failing to create genuine diffusion. (similarity 0.80)
- The dipole surround era ended because it was not scientifically sound (similarity 0.79)
- Dipole surrounds only worked for one row of listening positions (similarity 0.78)
Broader Connections
- Fully baffled loudspeakers eliminate dipole cancellation by enclosing the rear wave
#expands(0.85) — Eric J. Heller, Why You Hear What You Hear- An…, 615