1Jack K,Robert F,Larry M. Handbook of clinical audiology[M].5th.Ed.:Lippincott Williams & Wilkins,2002.608~609.
2Rutha A.Directional microphone hearing aids: a rising technology with bright promise[J]. The Hearing Journal,2003,56:9.
3Stephen C. Tutorial on microphone technologies for directional hearing aids[J].The Hearing Journal,2003,56:14.
4Stephens S, Meredith R. Qualitative reports of hearing aid benefit[J]. Clinical Rehabilitation,1991,5:225.
5Ricketts T, Lindley G, Henry P. Impact of compression and hearing aid style on directional hearing aid benefit and performance[J]. Ear and Hearing,2001, 22:348.
6Todd A. How fitting, patient, and environmental factors affect directional benefit[J].The Hearing Journal,2003,56:31.
7Ricketts TA. Directivity quantification in hearning aids:fitting and measurement effects[J].Ear and Hearing,2000,21:45.
8Jack K,Robert F,Larry M. Handbook of clinical audiology[M]. 5th.Ed: Lippincott Williams & Wilkins,2002.609~611.
9Brian E, Rauna K, Mary T. Real world performance of directional microphone hearing aids[J].The Hearing Journal,2003,56:40.