PRODUCT DATA

Binaural Recording Headphones Type 4965

Uses• Record binaural sound or two channels of audio for NVH

development applications, such as confirming prototype/design performance changes

• Benchmark vehicles for reference or processing into simple PULSE™ NVH Simulator models

• Capture vehicle behaviour during on-road evaluation or while using DTS On-Road Simulator

• General purpose two-channel data recorder with replay • Cabin noise measurements

Features• Easy to use and compact design• Record two channels of sound• CCLD analog inputs • Multi-country power supply• Calibrator adaptor for Binaural Microphone

Fig. 1 Binaural Recording Headphones Type 4965

DescriptionBinaural Recording Headphones Type 4965 are designed towork with Brüel & Kjær’s Sonoscout™ NVH Recorder, but theywork as well with any CCLD conditioning.

The headphones are focused on NVH testing, and are used forapplications where a person’s perception of sound is important tounderstand. As the headphones are positioned next to the testperson’s ears, they give the driver/passenger a perfectimpression of the vehicle experience.

The headphones are optimal in combination with Sonoscout. Themeasured sound data can be played back to the headphones viaBluetooth®, which in the Sonoscout application makes the userdevice completely wire-independent from the measurementsolution.

The headphones are also the ideal solution for obtaining data foruse with PULSE™ NVH Vehicle Simulator Type 3644.Simultaneously record audio and vehicle performance data withSonoscout and export NVH Vehicle Simulator models forprocessing.

TEDSThe headphones incorporate TEDS (Transducer Electronic DataSheet) microphones. This means that the actual identity andloaded sensitivity of the left and right microphones isprogrammed into the TEDS memory, to make setup very easy.

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Transport CaseThe entire Binaural Recording Headphone kit is contained in arugged transport case, see Fig. 2, and the main components arecompact enough to be carried in a coat pocket.

The kit contains an adaptor that allows the microphones to becalibrated with Sound Calibrator Type 4231.

Fig. 2 Contents of Type 4965’s transport case

EADQUARTERS: Brüel & Kjær Sound & Vibration Measurement A/S · DK-2850 Nærum · Denmarkelephone: +45 7741 2000 · Fax: +45 4580 1405 · www.bksv.com · info@bksv.com

ocal representatives and service organisations worldwide

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Specifications – Binaural Recording Headphones Type 4965

MICROPHONESCartridge Type: Prepolarized, gold-plated condenser element with vertical diaphragmMicrophone Size: 12.7 mm (0.5) length, 5.4 mm (0.21) capsule diameterFrequency Range: 20 Hz – 8 kHz, ±2 dB re 1 kHz, 3 dB soft boost at 8 – 20 kHz when measured in free-field for individual microphones at 0° incidenceSensitivity: Nominally 20 mV/Pa ±3 dB at 1 kHzEquivalent Noise Level, A-weighted: Typically 23 dB(A) re 20mPaMaximum Sound Pressure Level: 134 dB SPL before damageTotal Harmonic Distortion: <3% at 114 dB SPL (sine)Preamplifier Output Impedance: 30 – 40 Cable Drive Capability: Up to 3 m (10 ft)

Cable Length: 3 m (10 ft) from capsule to connectorWeight: <10g (down to cable clip) Operating Temperature Range: –40°C to 45°C (–40°F to 113°F)Relative Humidity (RH): Up to 90%Microphone Weight: <20 gram

HEADPHONESSennheiser® MM-100Weight: 54 gTechnology: Bluetooth Version 2.0 + EDRSupported Profiles: A2DP + AVRCP + HSP + HFPListening Time: 7.5 hCharging Time: 2.5 hStandby Time: < 220 hRange: 10 mColour: TitanFrequency Response (Headphones): 22 – 20.000 Hz

THD, Total Harmonic Distortion: Less than 0.2% at 1 KHz

TRANSPORT CASE(including system components)Dimensions: 253 207 70 mm (9.96 8.15 2.76)Weight: 640 g

ENVIRONMENTALTemperature Range: Operating: 10°C to 40°C (50°F to 108°F)Storage Temperature:–20°C to 70°C (–4°F to 158°F)

Compliance with EMC Directive and Low Voltage Directive of the EUCompliance with the EMC requirements of Australia and New Zealand

Ordering Information

Type 4965 Binaural Recording Headphones

Includes the following hardware:• KE-4335: Transport Case• HT-0025: Sennheiser Headphones• DP-0978: Calibrator Adaptor for Binaural

Microphones• ZG-0473: Multi-country power supply for

headphones• 2 WA-1705: UNF10-32 SMB adaptor• 2 JP-0145: UNF10-32 BNC adaptor

OPTIONAL ACCESSORIESType 4231 Sound Calibrator

CALIBRATION SERVICE4965-CFF Factory Standard Calibration

with TEDS update

TRADEMARKSBluetooth is a registered trademark of Bluetooth SIG, Inc. · Sennheiser is a registered trademark of Sennheiser Electronic GMBH & Co. KG

Brüel & Kjær reserves the right to change specifications and accessories without notice. © Brüel & Kjær. All rights reserved.