HBKShop | Training | Resources

arrow_back_ios

Main Menu

See All Products See All ナレッジ See All ソリューション See All サービス＆サポート See All HBKについて See All お問い合わせ
arrow_back_ios

Main Menu

See All Acoustic End-of-Line Test Systems See All DAQ and instruments See All Electroacoustics See All Software See All Sensors See All Vibration Testing Equipment See All リソースセンター See All アプリケーション See All 各産業 See All インサイト See All サービス See All サポート See All 当社の事業 See All 私たちの歴史 See All サステナビリティ（持続可能性） See All グローバルな事業展開
arrow_back_ios

Main Menu

See All Actuators See All Combustion Engines See All Durability See All eDrive See All Transmission Gearboxes See All Turbo Charger See All DAQ Systems See All High Precision and Calibration Systems See All Industrial electronics See All Power Analyser See All S&V Hand-held devices See All S&V Signal conditioner See All Wireless DAQ Systems See All Pinnae See All Accessories See All DAQ See All Drivers API See All nCode - Durability and Fatigue Analysis See All ReliaSoft - Reliability Analysis and Management See All Test Data Management See All Utility See All Vibration Control See All Inertial Sensor Software See All Acoustic See All Current / voltage See All Displacement See All Force See All Inertial Sensors See All Load Cells See All Pressure See All Strain See All Torque See All Vibration See All Exciters See All Smart Sensors IO-Link See All Shaker Systems See All Power Amplifiers See All Vibration Controllers See All 音響 See All 設備とプロセスの監視 See All カスタムセンサ See All データの取得と分析 See All 耐久性および疲労 See All Electric Power Testing（電力テスト） See All NVH See All 信頼性 See All スマートセンサ See All 振動 See All 計量 See All 自動車および地上輸送 See All 校正 See All インストール、メンテナンス、修理 See All サポート ：ブリュエル・ケアー製品 See All Release Notes See All コンプライアンス (Compliance) See All Our People
arrow_back_ios

Main Menu

See All CANHEAD See All GenHS See All LAN-XI See All MGCplus See All Optical Interrogators See All QuantumX See All SomatXR See All Fusion-LN See All Accessories See All Hand-held Software See All Accessories See All Wireless Gateways See All Wireless Nodes See All BK Connect Pulse See All API See All Microphone sets See All Cartridges See All Special Microphones See All Acoustic Calibrators See All Microphone Pre-amplifiers See All Sound Sources See All Acoustic Transducer Accessories See All Accessories See All Digital load cells See All Accessories See All Experimental testing See All Transducer Manufacturing (OEM) See All Accessories See All Rotary Torque Sensors See All CCLD (IEPE) accelerometers See All Charge Accelerometers See All Impulse hammers / impedance heads See All Cables See All Accessories See All Accessories See All Power amplifier See All Accessories for exciters See All 電気音響 See All 音源探査（Noise source identification, NSI） See All 環境騒音 See All 音響パワーと音圧 See All 騒音認証 See All 産業用プロセスコントロール See All 構造ヘルスモニタリング See All 電気デバイス試験 See All 電気システム試験 See All グリッド試験 See All 高電圧試験 See All 導電加振機による振動試験 See All 構造力学 See All 機械分析と診断 See All プロセス計量 See All 車両の電動化 See All トランスデューサの校正サービス See All ハンドヘルド測定器の校正サービス See All 機器およびDAQの校正サービス See All 現地での校正 See All リソース See All ソフトウェアライセンス管理
Type 4178 Case with Type 4939

TYPE 4178

1/4" SOUND INTENSITY MICROPHONE PAIR, EXT. POLARIZED

Sound Intensity Microphones specially designed for high level and high frequency measurements over a frequency range of 4 Hz to 100 kHz,  with broadband matching of phase responses.

img

TYPE 4178

expand_more
chevron_left
chevron_right

Type 4178 consists of a pair of selected Type 4939 1/4-inch microphones, whose phase responses are matched between 100 Hz and 20 kHz.

  • Measurement of sound intensity using the two-microphone technique, following IEC 61043 Class 1
  • Sound power measurements following ISO 9614-1, ISO 9614-2, ECMA 160, and ANSI S12.12, using sound intensity probes
  • Measurement of particle velocity of sound sources

Features

  • Broadband matching of phase responses
  • Phase calibrated in 1/3-octave frequency bands from 100 Hz – 20 kHz

Type 4939 microphones are specially designed for high-level and high-frequency measurements. By using stainless steel diaphragm and protection grid, the microphone is optimized to withstand rough environments and is capable of working at high temperatures – up to 150°C (302°F). The microphones are mainly used in Sound Intensity Probes for sound power and intensity measurements, and can also be used for particle velocity measurements.

Type 4178 is supplied with 6 mm and 12 mm spacers, along with calibration charts giving the individually measured free-field frequency response for each microphone and a Phase Response Comparison Calibration (100 Hz – 20 kHz).

Calibration

Phase calibration of 1/4-inch microphone pair Type 4178 is done at Brüel & Kjær by subjecting the two microphones to the same sound signal in a pressure coupler. This individual phase calibration can be used to derive the Pressure-Residual Intensity Index for the microphone pair.

Sound intensity measurement systems containing a sound intensity probe set can be conveniently calibrated using
Sound Intensity Calibrator Type 3541-A. This permits simultaneous sensitivity adjustment of both channels of the processor (in pressure, particle velocity, or intensity modes) and allows determination of the 20 Hz – 5 kHz Pressure-Residual Intensity Index of the probe and processor combinations.