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BRUEL & KJAER HATS 4606, User Manual

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BRUEL & KJAER HATS 4606 User Manual Download Page 29

CHAPTER 3

Characteristics

21

Fig.3.2

Typical free-field TFR of Type 5128-C (100 Hz – 20 kHz)

3.2.2

Normalized Free-field Response Distribution

The sound-pressure level distribution around the mouth of Type 5128 for “whole speech” is

shown in Fig.3.3; it closely follows the distribution around the human mouth. The measurement

was made with the mouth insert in place. 

85

90

95

100

105

110

115

120

125

130

135

100

1000

10000

Frequency (Hz)

990062/2

dB

TFR

Summary of Contents for HATS 4606

Page 1: ...USER MANUAL www bksv com Br el Kj r All rights reserved High frequency Head and Torso Simulator HF HATS Type 5128 Handset Positioner for HATS Type 4606 BE 1909 14 English BE 1909 C BE 1909 14...

Page 2: ......

Page 3: ...BE 1909 14 December 2019 www bksv com High frequency Head and Torso Simulator HF HATS Type 5128 Handset Positioner for HATS Type 4606 User Manual...

Page 4: ...ls a situation or practice that requires attention but does not directly result in personal injury if ignored Risks and Hazards Explosion Hazards Danger The apparatus is not designed to be used in pot...

Page 5: ......

Page 6: ...e of or reliance upon any of the content of this document regardless of whether such content has been accurate or complete Br el Kj r will not pay any damages whether for loss or injury punitive or ot...

Page 7: ...the Ear Simulator 9 2 6 Assembling Tabletop HATS Type 5128 B 17 2 7 Disassembling HF HATS Type 5128 18 CHAPTER 3 Characteristics 19 3 1 Construction of HATS 19 3 2 Mouth Simulator Operating Character...

Page 8: ...6 2 Specifications Tabletop HATS Type 5128 B 48 6 3 Specifications HF HATS Types 5128 C and 5128 D 48 APPENDIX A Literature References 49 APPENDIX B Glossary 51 INDEX 55...

Page 9: ...tanding or fitted on a tripod or turntable using the tripod mounting adapter 1 3 Tabletop HATS Type 5128 B TabletopHATSType5128 Bisdedicatedtotestingalltypesofheadphones Itusesthesamehead that is supp...

Page 10: ...icone rubber pinna with a hardness close to a real human ear pinna connected to an average human ear canal The ear canal ends in anoccludedearsimulatorthatsimulatesanaveragehumaneardrum Theoccludedear...

Page 11: ...included with all HF HATS Types 1 Calibrator Adapter DI 0658 2 Data Disk for HATS BC 5009 Additional accessories included with HF HATS Types 5128 C D 3 Microphone Holder UI 0209 for 7 mm wide 1 4 micr...

Page 12: ...al accessories for Type 5128 1 Sound Calibrator Type 4231 2 Adapter for 1 4 Microphone DP 0775 3 Pressure field 1 4 Microphone Type 4944 A 4 Feet UA 1043 incl 4 3 mm bolts and rubber spacers 5 Tripod...

Page 13: ...spacers supplied are placed between the base of the torso and the extra feet secure the extra feet with the screws supplied The small rubber feet can be fitted to the extra feet if desired as in Fig...

Page 14: ...h simulator only 2 for configurations with left and right ear simulators only 3 for configurations with left and right ear simulators and a mouth simulator 2 3 Calibration of the Mouth Simulator The m...

Page 15: ...2 4 Microphone holder with adapter DI 1058 fitted shown before 1 4 microphone is located in position Type 4128 C D shown Before calibrating the mouth simulator the microphone and audio analyzer should...

Page 16: ...require that information about the actual sensitivity of the ear simulator is provided This can be accommodated in two ways By using transducer electronic data sheet TEDS information about the coupler...

Page 17: ...wo pieces engage properly before you screw in the calibration adapter Do not over tighten Do not touch the microphone diaphragm 4 Fit the calibrator onto the adapter Ensure that it is pushed firmly ov...

Page 18: ...High frequency Head and Torso Simulator HF HATS Type 5128 User Manual 10 Fig 2 6 Calibration of the ear simulator on Type 5128 B C D...

Page 19: ...s of the pinna might change over time Please see Fig 2 6 2 and Fig 2 6 10 for positioning of the label 2 5 1 Separating the Head from the Torso Types 5128 C D Only Separate the head from the torso by...

Page 20: ...the right ear simulator Type 4620 R and the left ear simulator Type 4620 L The calibration data supplied is listed in Table 2 2 Only the listener free field frequency response and the talker frequenc...

Page 21: ...75 elevation and 0 360 azimuth in 15 steps Left ear 90 elevation at 0 LFR L EL 15 AZ 0 360 txt LFR L EL 30 AZ 0 360 txt LFR L EL 45 AZ 0 360 txt LFR L EL 60 AZ 0 360 txt LFR L EL 75 AZ 0 360 txt LFR L...

Page 22: ...d with foam Transfer function from MRP to DRP ERP DRP txt ERP to DRP transfer function 20 Hz 20 kHz The ERP DRP correction function given in ITU T Rec P 57 EEP DRP txt EEP to DRP transfer function 20...

Page 23: ...sound incidence for which measurements are given for each of the elevation angles given in Fig 2 9 Elevation 0 El 15 El 30 El 45 El 60 El 75 El 90 El 15 El 30 El 45 El 60 El 75 El 90 990095 1 Azimuth...

Page 24: ...Table 2 3 Measurement points as specified in ITU T Rec P 51 Measurement Point On axis Displacement from Lip Plane mm Off axis Perpendicular Displacement mm 1 12 5 0 2 50 0 3 100 0 4 140 0 5 0 20 horiz...

Page 25: ...ot Before it can be used the cables in the support foot UA 2180 should be fitted to the connectors on the connector plate inside the neck To connect your Tabletop HATS use the following procedure and...

Page 26: ...ould be performed prior to performing measurements on headsets for example CAUTION If Tabletop HATS is equipped with a mouth simulator please be aware that the reflections produced by the shoulders of...

Page 27: ...support foot 3 1 2 Mouth Simulator Construction Fig 3 1 Construction of the HF HATS mouth The construction of the mouth simulator of HATS is shown in Fig 3 1 It features a high compliance loudspeaker...

Page 28: ...During normal use of HATS there should be no need to disassemble the mouth simulator If problems are experienced with the mouth simulator contact your local Br el Kj r representative 3 1 3 Ear Simulat...

Page 29: ...nse Distribution The sound pressure level distribution around the mouth of Type 5128 for whole speech is shown in Fig 3 3 it closely follows the distribution around the human mouth The measurement was...

Page 30: ...ig 3 4 Second and third harmonic distortion of the mouth simulator 0 5 0 2 1 V e rtic a l P la n e H o riz o n ta l P la n e 8 0 1 0 0 m m m m 6 0 4 0 2 0 8 0 1 0 0 6 0 4 0 2 0 0 2 0 4 0 6 0m m8 0 1 0...

Page 31: ...low levels would lead to inaccuracies due to the heating effects Variation of performance with variation of ambient temperature and pressure is negligible within the specified operating temperature an...

Page 32: ...g used The variation between any two left pinnae or any two right pinnae is less than 1 dB so if replacement pinnae are used there will be no problem comparing results with those of previous measureme...

Page 33: ...r PULSE Audio Analyzer with an ear simulator fitted in the left and right ear of Type 5128 C 0 corresponds to sound incident on the face of Type 5128 C and 90 corresponds to sound incident on the left...

Page 34: ...ree field 20 Hz 20 kHz Fig 3 10 Off axis response of Type 5128 C 270 in the free field 20 Hz 20 kHz 30 25 20 15 10 5 0 5 10 15 20 dB 20 200 2000 20 000 LFR 90 deg L LFR 90 deg R Frequency Hz 180063 30...

Page 35: ...etone The mouth ear sidetone characteristic of HATS that is the influence of the mouth simulator output on the ear simulator output is shown in Fig 3 12 for both an open and a closed ear Open ear side...

Page 36: ...13 Influence of ambient pressure on the transfer impedance of the ear simulator The graph shows the transfer impedance multiplied by the frequency relative to 500 Hz value 100 90 80 70 60 50 40 30 20...

Page 37: ...ioner Assembly the Mounting Bracket and the Alignment Jig Fig 4 1 1 Cradle UA 1541 2 Cradle Positioner Assembly UA 1542 3 Mounting Bracket UA 1534 4 Alignment Jig UA 1535 Type 4606 has been designed f...

Page 38: ...the HATS position where its Ear Cap Reference Point ECRP and the HATS pinna ERP coincide all rotational adjustments provided by the Type 4606 occur around the ERP CAUTION The feet see Fig 1 2 must be...

Page 39: ...specified areas of the handset avoiding buttons etc Adjustment knobs allow the forks to be offset and inclined and knurled lock nuts secure the assembly to the cradle The two centering forks can be pl...

Page 40: ...ntrols the positioning of the phone along its longitudinal axis and similarly to the supports can be extended or retracted using an adjustment knob The centering forks supports support feet and end st...

Page 41: ...S Type 4606 Features and Functions 33 Centering forks Use UA 1537 for handset widths ranging from 26 to 66 mm Use UA 1587 for handset widths ranging from 26 to 92 mm Fig 4 6 The two centering fork var...

Page 42: ...RPs of the left and right ears of HATS The handset positioner is adjusted along this axis by rotating the adjustment sleeve with the displacement indicated on the ERP axis displacement scale The locki...

Page 43: ...andsets mounted in the cradle to be rotated about the ERP axis A Graduated markings allow the angle setting to be easily documented For details see section 4 2 Fig 4 8 Mounting bracket 4 1 5 Alignment...

Page 44: ...28 C D replace the alignment pins for Type 4128 C D with the alignment pins for Type 5128 C D It is recommended that Type 4606 is checked on a regular basis Specifically if any part of the handset pos...

Page 45: ...CHAPTER 4 Handset Positioner for HATS Type 4606 Features and Functions 37 Fig 4 9 Attaching the cradle positioner...

Page 46: ...that they will not interfere with the handset 3 Tip down the sight and lock it in position 4 Make sure that the handset can be supported by both support feet If necessary move the rear support to a d...

Page 47: ...the barrel of the cradle positioner assembly to move the cradle along the ERP axis until the handset is firmly pressed against the HATS pinna and lock the barrel in place 3 Rotate the adjustment sleev...

Page 48: ...nual 40 Fig 4 11 Applying the cradle and adjusting the angles position and application force Rotation in Three Planes All three adjustment angles A B and C rotate about the handset ECRP point B and C...

Page 49: ...rear support foot These sockets are numbered 1 5 with socket 1 closest to the front support 4 3 2 Support Foot Front and rear share the same definitions as the centering forks along with socket positi...

Page 50: ...ering Fork Angle Settings Distance from actual ECRP ye mm Ze mm Application Force N ERP position mm MECRP A B C Telephone Handset Type Operator Date Comments Measurement Data Path Support foot offset...

Page 51: ...m axis with positive direction towards the right side of the head and the zm axis is perpendicular to the xm axis and ym axis with positive direction upwards This head fixed coordinate system correspo...

Page 52: ...able ranges relative to the standard position and the Manufacturer defined Ear Cap Reference Point MECRP allows for movement of the ECRP point on the surface of the phone The acceptable ranges of hand...

Page 53: ...normal use there should be no significant deviation from the stated specifications However if a fault occurs disconnect HF HATS from all external instruments and consult your local Br el Kj r service...

Page 54: ...High frequency Head and Torso Simulator HF HATS Type 5128 User Manual 46...

Page 55: ...measurement control and laboratory use EMC Emission EN IEC 61000 6 3 Generic emission standard for residential commercial and light industrial environments CISPR 22 Radio disturbance characteristics o...

Page 56: ...AR TRACKING Betterthan 1 dBupto5 kHz betterthan 3 dBupto20 kHz PINNA SIMULATORS Dimensions comply with ITU T Rec P 58 IEC 60318 7 and ANSI S3 36 Types 5128 C D are supplied with calibrated pinnae and...

Page 57: ...fuss Associates MIT Press Massachusetts Institute of Technology Cambridge MA 02142 ISBN 0 262 54027 4 ITU T Rec P 50 Artificial voices ITU T Rec P 51 Artificial Mouth this document refers to a rotatio...

Page 58: ...High frequency Head and Torso Simulator HF HATS Type 5128 User Manual 50...

Page 59: ...hreshold of hearing 20 Pa to 130 dB at the threshold of pain 100 Pa Our hearing covers a surprisingly wide range of sound pressures a ratio of over a million to one The dB scale makes the numbers mana...

Page 60: ...ferencepoint TheECRPistheintersectionoftheexternalear capreference plane ECRP Plane with a normal axis through the effective acoustic centre of the sound outlet ports Generally the acoustic centre of...

Page 61: ...ear s response to low medium noise levels A C weighting curve is also used particularly when evaluating very loud or low frequency sounds HRP HATS reference point The point bisecting the line joining...

Page 62: ...s speech is heard in their own ear at ERP Sound Any pressure variation that the human ear can detect Just like dominoes a wave motion is set off when an element sets the nearest particle of air into...

Page 63: ...f Ear Simulator 9 Calibration of Tabletop HATS 18 Calibration of the Mouth Simulator 6 Characteristics 19 Closed volume Characteristics Ear Simulator 27 Compliance with Standards 47 48 Connecting Tabl...

Page 64: ...h Equalization 7 Mouth Simulator 1 Calibration 6 Utilizing 5 Mouth Simulator Construction 19 Mouth Simulator Operating Characteristics 20 N Normalized Free field Response Distribution 21 O Overload Pr...

Page 65: ...57 U UA 1043 5 UA 2180 Tabletop HATS Support Foot 17 Using Handset Positioner for HATS Type 4606 36 Utilizing the Mouth Simulator 5...

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Page 68: ...USER MANUAL www bksv com Br el Kj r All rights reserved High frequency Head and Torso Simulator HF HATS Type 5128 Handset Positioner for HATS Type 4606 BE 1909 14 English BE 1909 C BE 1909 14...

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