BRUEL & KJAER 4152 Скачать руководство пользователя страница 1 | Manualshive

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Содержание 4152

Страница 1: ... Type 4152 For measurement on earphones as used in hearing aids and telephone communication systems Provided with couplers made in accordance with the lEG Recommendation 126 and various American and German Standards ...

Страница 2: ...Artificial Ear Type 4152 December 1970 ...

Страница 3: ...of a Complete Arrangement for the Testing of the Earphone 10 Artificial Ear in Connection with the Precision Sound Level Meter 13 3 Application 16 Automatic Recording of Harmonics in Earphones 16 Some Typical Examples of Coupler Adaptation 17 4 Appcndix 20 Influence of Vibration 20 Use of protecting cover in the 6 cm3 Coupler 22 ...

Страница 4: ...mounting of a Condenser Microphone Cartridge Type 4144 and a Micro phone Preamplifier Type 2619 or the Sound Level Meter Type 2203 Fig 1 1 The Artificial Ear Type 4152 A spring arrangement is provided to fulfil certain Standards requirements regarding the force applied to the object under measurement It can be adjusted to apply a force of 200 grammes to an earphone when using the 2 cms Coupler as ...

Страница 5: ...ket with the mounting arrangement for the condenser microphone The guard ring internal shield principle used in the Microphone Preamplifier Type 2619 is extended to include the socket which keeps the effective transmission loss of the 4152 as low as approximately 0 1 dB As indicating meter the Microphone Preamplifier Type 2619 and the Measur ing Amplifier Type 2606 can be used as well as the Sound...

Страница 6: ...s of a rubber ring which is also used as a lock arrangement for the nub of the earphones for hearing aids The 18 mm ear mould substitute is made removable to allow other adapters to be used if required as shown on p 18 When the Condenser Microphone cartridge is screwed into the coupler the effective volume including the equivalent volume of the cartridge is 2 ems within the tolerances permitted by...

Страница 7: ...Coupler and ANSI Z 24 5 1951 the other being in accordance with the requirements of the ANSI Z 24 9 1949 Type 1 Coupler Sectional views of the couplers are shown in Fig 1 6 According to the standards the couplers should be used in connection with microphones supplied with a front cavity As the Microphone Cartridge Type 4144 is made with a flat front a Coupler Adapter Ring DB 0111 is supplied with ...

Страница 8: ...may be done by employing the method described in the following The method of mounting the 2 ems coupler is described above but to mount the two 6 cm3 coupuers the micro phone cartridge is screwed off the preamplifier and the stop collar YO 2340 which is delivered with the couplers DB 0160 and DB 0161 but not wiih the Artificial Ear Type 4152 is placed on top of the preamplifier so that the preampl...

Страница 9: ...Couplers couplers are used directly on the microphone it is recommended to use one of the B K microphone stands Packing Washer CoupLer Adopter Condenser Microphone Cartridge 6 cc CoupLer ASA Type 1 Stop Collar Preamplifier Fig 1 7 Sketch showing how the 6 cm3 Couplers are mounted directly on the Condenser Microphone 8 ...

Страница 10: ...ler 6 ems Coupler 3 If it is desired to use an adapter other than the standardized 18 mm ear mould substitute then this should be replaced by the desired one see page 18 4 Screw the Coupler onto the micro phone NBI Take great care not to damage the diaphragm 3a Screw the Coupler Adapter Ring onto the microphone 4a Screw the Coupler to the Coupler Socket 5 Mount the earphone to be tested on the top...

Страница 11: ...f earphone characteristics It consists of a Beat Frequency Oscillator Type 1022 together with a Level Recorder Type 2305 and a Measuring Amplifier Type 2606 The adjustment of the different instruments are made as follows Adjustment of the Oscillator 1 Turn the toggle switch marked POWER to On and adjust the frequency scale as described in the Instruction Manual for the Type 1022 under Operation 2 ...

Страница 12: ...1 2 Set the controls of the Measuring Amplifier INPUT Preamp METER FUNCTION RMS Fast INPUT SECTION ATTENUATOR 0 1 V OUTPUT SECTION ATTE UATOR x 1 Select the pushbuUons Ref 50 mV RMS 22 4 Hz HP 22 4 kHz LP No weighting network should be selectel and the RECORDER output switch should be in position AC 3 Switch POWER On and allow 30 sec to warm up 4 Determine the microphone Open Circuit Sensitivity f...

Страница 13: ...e speed now corresponds to the small figures marked around the PAPER SPEED knob See Fig 2 2 Drive Shofts pI 5 Fig 2 2 Front and side view of the Level Recorder Type 2305 pI 8 PAPER DRIVE to Start and Forward commencing the paper to run this will continue until the built in automatic single chart stop switch declutches the drive mechanism one chart length or less 9 By means of the finger wheel Z Fi...

Страница 14: ... with the Precision Souud Level Meter As amplifier and indicating meter it is possible to use the Precision Sound Level Meter Type 2200 The Artificial Ear and 2203 make a very handy combination for audiometer control and the measuring set up must be adjusted in the following way Assemble the Artificial Ear as described under Operation of the Artificial Ear page 10 and use the coupler suited for th...

Страница 15: ...nd the sound pressure level in the Artificial Ear is measured 7 If the meter pointer does not deflect when knob 2 is fully clockwise then turn knob 3 counter clockwise until the pointer deflects between 0 10 dB and the sound pressure level can be measured 14 Further it is possible to use the Sound Level Meter in connection with the Level Recorder Type 2305 for automatic recording of the frequency ...

Страница 16: ...Circle Adjustment Knob 2 black knob Knob 3 transparent knob Meter Light Fi lter Input Output Socket Filter Output Pilot Lamp flashing when on Knob 1 f6 7d 1 Fig 2 5 The Sound Level Meter with identification of knobs 16 ...

Страница 17: ...ion such as the B K Beat Frequency Oscillator Type 1022 and the Audio Frequency Spectrometer 2113 an equipment is obtained for measuring harmonics produced in earphones If the Spectrometer and the B F O are 16 2113 2619 4152 Fig 3 1 Measuring arrangement for automatically measuring frequency characteristics and harmonic distortion of earphones ...

Страница 18: ...anning of the BFO the selected space difference being in accordance with the harmonic which is going to be measured By means of the facility included in the Level Recorder Type 23 5 which allows the recording paper to be reversed by one chart length without loosing the synchronization between the BFO and the Spectrometer the harmonics are readily recorded on the same chart as the fundamental Some ...

Страница 19: ...ounting for measurements on hearing aid earphones with coupling pieces 8231 Flexible connecting tube mounted on adapter The adopter is in this case replacing the ear insert Fig 3 4 Coupler mounting for measurements on hearing aids speelable tl pe coupler directly attached to the sound tube 18 ...

Страница 20: ... B K but can easily be made by the user for his own special purposes Adopter provided with hole for ear insert Fig 3 5 Coupler mounting for measurements on hearing aid earphones with special rubber inserts Example of mounting of earpiece in 2cm3 coupler Fig 3 6 Coupler mounting for measurements on hearing aid earphones with moulded ear insert 1 9 ...

Страница 21: ... i t s I I QP 1123 11 100 1000 11000 63755 Fig Al Recording showing the influence of llIecllUnical vibratioIl is vibration and shock insulated by means of three soft rubberfeet however large vibration may cause error in the measuring result See Fig Al Especial ly headphones having a soft rubber ring to provide a good fit to the head 1 1 j j e j 1022 Fig A2 Vibration insulating of the set up consis...

Страница 22: ...ure The headphone may act as an accelerometer and great care should be taken to avoid this One way to overcome the problem may be to place the combination Sound Level Meter Type 2203 Artificial Ear Type 4152 perpendicular to the direction of the vibration on a piece of foam rubber see Fig A2 and A3 or use a narrow band filter A selective measuring set up for automatic recording is shown in Fig A4a...

Страница 23: ...ing the micropllOne with protection cover when used in the NBS type 9 A Coupler a No protection cover on the microphone b Microphone su pplied with the normal B K protection cover c Microphone supplied with the normal B K protection cover and with vase line between protection cover and microphone of this arrangement is a change in impedance of approx 0 8 dB of the coupler up to 1000 Hz and above t...

Страница 24: ...et up as described in the standard Fig A5 By using a B K condenser microphone with its normal protecting cover and vaseline in the gap in the Artificial Ear Type 4152 a measuring set up is obtained which does not completely look like the requirement in the standard but the result by using that set up will correspond closely to the standard Another way to protect the diaphragm is to use the Coupler...

Страница 25: ......

Страница 26: ...her Type 41 52 BB 0216 I st ruction Manuel Gebrauchsanweisung Manuel d instruct ion Brugsanvisning engelsk BS 0501 fransk francaise BB 0502 tysk Deutsch 1 DB 1021 Guard ring adaptor Guard ring adaptor Guard ring adaptor SklErmforllEnger BB 0503 Brugsvejledning russisk B X 0103 ...

Страница 27: ...rs Accelerometer Preamplifiers Accelerometer Calibrators Vibration Meters Magnetic Transducers Capacitive Transducers Vibration Exciter Controls Vibration Programmers Vibration Signal Selectors Mini Shakers Complex Modulus Apparatus Stroboscopes GENERATING Beat Frequency Oscillators Random Noise Generators Sine Random Generators MEASURING Measuring Amplifiers Voltmeters Deviation Bridges Megohmmet...

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