The FONIX 8000 Hearing Aid Test System is a direct descendent of the FONIX 7000 Hearing Aid Test System, prized by hearing health professionals the world over for its dependability, accuracy, and advanced testing capability. The new FONIX 8000 advances the science of hearing aid testing even farther with the introduction of the optional 8120 Polar Plot Sound Chamber. Polar Plot Testing The FONIX 8000 Hearing Aid Test System has a Polar Plot Option that includes a new test screen capable of performing polar plots of directional hearing aids and giving you a much better picture of the directional characteristics of these hearing aids. Although the results are not a replacement for laboratory testing using an anechoic chamber, the 8120 Polar Plot chamber provides the hearing health professional with a clinical tool for verifying approximate directionality characteristics of the hearing aid.