The acoustic reflex at a 1000 Hz probe freqeuncy: Phasor and Vector Analysis
Phasor plots of reflex growth functions have been inconclusive concerning the effect of the reflex for mass dominated ears. The present study aimed to establish whether vector plots clarified the effects of the reflex for phasors not showing a clear circular shape. Measured admittance data (ipsilate...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
AOSIS
1995-12-01
|
| Series: | South African Journal of Communication Disorders |
| Subjects: | |
| Online Access: | https://sajcd.org.za/index.php/sajcd/article/view/245 |
| _version_ | 1818188792819875840 |
|---|---|
| author | Judy Ferguson Louise Reynolds |
| author_facet | Judy Ferguson Louise Reynolds |
| author_sort | Judy Ferguson |
| collection | DOAJ |
| description | Phasor plots of reflex growth functions have been inconclusive concerning the effect of the reflex for mass dominated ears. The present study aimed to establish whether vector plots clarified the effects of the reflex for phasors not showing a clear circular shape. Measured admittance data (ipsilateral reflexes across a wide intensity range) was represented as both phasor diagrams and converted to impedance quantities, represented as vectors. The results analysed for 34 ears showed few unclassifiable phasor diagrams. In addition, all growth functions showed increased stiffness on vector analysis. Resistance changes appeared to be variable. The results suggest that vector diagrams may be a useful way of representing data that is not clearly represented via phasor diagrams. The current study, however, does not clarify the pattern for mass dominated ears. |
| first_indexed | 2024-12-11T23:32:34Z |
| format | Article |
| id | doaj.art-cf317bc3ada7476eb304a3532474a90d |
| institution | Directory Open Access Journal |
| issn | 0379-8046 2225-4765 |
| language | English |
| last_indexed | 2024-12-11T23:32:34Z |
| publishDate | 1995-12-01 |
| publisher | AOSIS |
| record_format | Article |
| series | South African Journal of Communication Disorders |
| spelling | doaj.art-cf317bc3ada7476eb304a3532474a90d2022-12-22T00:46:00ZengAOSISSouth African Journal of Communication Disorders0379-80462225-47651995-12-0142110.4102/sajcd.v42i1.245148The acoustic reflex at a 1000 Hz probe freqeuncy: Phasor and Vector AnalysisJudy Ferguson0Louise Reynolds1Department of Logopaedics, University of Cape TownDepartment of Logopaedics, University of Cape TownPhasor plots of reflex growth functions have been inconclusive concerning the effect of the reflex for mass dominated ears. The present study aimed to establish whether vector plots clarified the effects of the reflex for phasors not showing a clear circular shape. Measured admittance data (ipsilateral reflexes across a wide intensity range) was represented as both phasor diagrams and converted to impedance quantities, represented as vectors. The results analysed for 34 ears showed few unclassifiable phasor diagrams. In addition, all growth functions showed increased stiffness on vector analysis. Resistance changes appeared to be variable. The results suggest that vector diagrams may be a useful way of representing data that is not clearly represented via phasor diagrams. The current study, however, does not clarify the pattern for mass dominated ears.https://sajcd.org.za/index.php/sajcd/article/view/245immittancereflex measureshigh probe frequencyphasorsvectors |
| spellingShingle | Judy Ferguson Louise Reynolds The acoustic reflex at a 1000 Hz probe freqeuncy: Phasor and Vector Analysis South African Journal of Communication Disorders immittance reflex measures high probe frequency phasors vectors |
| title | The acoustic reflex at a 1000 Hz probe freqeuncy: Phasor and Vector Analysis |
| title_full | The acoustic reflex at a 1000 Hz probe freqeuncy: Phasor and Vector Analysis |
| title_fullStr | The acoustic reflex at a 1000 Hz probe freqeuncy: Phasor and Vector Analysis |
| title_full_unstemmed | The acoustic reflex at a 1000 Hz probe freqeuncy: Phasor and Vector Analysis |
| title_short | The acoustic reflex at a 1000 Hz probe freqeuncy: Phasor and Vector Analysis |
| title_sort | acoustic reflex at a 1000 hz probe freqeuncy phasor and vector analysis |
| topic | immittance reflex measures high probe frequency phasors vectors |
| url | https://sajcd.org.za/index.php/sajcd/article/view/245 |
| work_keys_str_mv | AT judyferguson theacousticreflexata1000hzprobefreqeuncyphasorandvectoranalysis AT louisereynolds theacousticreflexata1000hzprobefreqeuncyphasorandvectoranalysis AT judyferguson acousticreflexata1000hzprobefreqeuncyphasorandvectoranalysis AT louisereynolds acousticreflexata1000hzprobefreqeuncyphasorandvectoranalysis |