Preamplifier

Experience the Norsonic NOR1205 Microphones/preamplifiers — engineered for precise, standards-compliant acoustic measurements. Specifications Frequency range: 2Hz to 200kHz ±0.2dB Input impedance: 20 Gohms, 0.2pF Output impedance: 55 ohms @ 1kHz, CS: 20pF Noise, A-weighted, CS 20pF: <3µV Noise linear, CS 20pF: <6µV Gain, typical: -0.15dB Temperature, operation: -40 to +60°C Temperature, storage: -40 to +85°C Humidity, operation and storage: 0 to 95% RH Current consumption (120V or ±60V): 2.5 mA Current consumption (28V or ±15V): 0.7 mA Dimensions: Length: 77.5 mm Diameter: 6,35 mm (front part) 12.7 mm (connector part) Weight: 27 g CE classification, EMC: EMC: EN 50081-1, EN 50082-1 CE classification, safety: EN 61010-1, 1993 portable equipment pollution category 2

Explore the Norsonic NOR1207 Microphones/preamplifiers — engineered for precise, standards-compliant acoustic measurements. Overview The key components that determines the accuracy of a sound level meter is the measurement microphone and its associated preamplifier. The effectiveness of these components in converting the acoustic signal into an electrical analogue set the maximum accuracy that can be achieved by the ensuing signal processing. Norsonic have a carefully balanced range of measurement microphones to suite a range of applications that complement modern instrumentation yet maintain traditional values. We offer a broad range of 1/2″ and 1/4″ microphone preamplifiers. Broad frequency response. Low noise. High input impedance. Low output impedance for driving long microphones cable without any loss in performance. High dynamic range. Specifications (Data given with 3mA supply current) The preamplifier has to be supplied by a constant current in the range 3 – 20 mA. The output voltage will be a fixed DC (about 10 volt) plus the AC-coupled input voltage. Output AC-voltage swing is minimum +/-5 volt if not limited by the voltage for the current source. Dynamic range: > 120dB Input impedance: 20 Gohm, 2.5 pF (typical) for Nor1207/BNC 20 Gohm, 18 pF (typical) for Nor1207 Frequency response ± 0.1 dB: (10 Hz – 20 kHz) Typical attenuation with microphone Nor1228 (18pF) due to capacitive loading: 1 dB for Nor1207/BNC and 6 dB for Nor1207 No signal DC out: 10 ± 2 volt Output impedance: 35 ohm typical Length incl. microphone Nor1228: 96 mm Diameter: Nor1207/BNC: 14,5 mm Nor1207: 16 mm Weight incl. microphone Nor1228: 50 g Power consumption: 30 mW (dependent on supplied current) EMC classification: As for sound level meter Nor131 Temperature for specified operation: -10°C to +50°C Temperature for storing: -30°C to +70°C Humidity for storing and operation: 0 – 90% RH Microphone heating: No extra heating available Frequency response Frequency response Nor1207

Experience the Norsonic NOR1227 Microphones/preamplifiers — engineered for precise, standards-compliant acoustic measurements. About All Norsonic microphones are free-field types. A free-field microphone is designed to measure the sound pressure in the sound field, compensating for the influence of the presence of the microphone in the sound field. In effect, the microphone measures the sound pressure as it existed before the microphone was introduced in the sound field, i.e. free-field conditions. Applicable standard is IEC 61672 and the former IEC 60651. The free-field microphone should be pointed towards the sound source at a 0° angle of incidence. Specifications Cartridge size: ½” inch Main standard: IEC 61672 Class 1 Polarisation voltage: 0 volt IEC 61094-4 Designation: WS2F Nominal sensitivity: 50 mV/Pa Frequency response: ±1dB 5 Hz – 10k Hz, ±3 dB 3,15 Hz – 20 kHz Maximum SPL (3% dist): 146 dB re. 20µPa Self noise: 15 dB(A) Capacitance: 14 pF Temperature coeff. (250 Hz): <0.005 dB°C Max. temperature: 120 °C Static pressure coeff. (250 Hz): -0.008 dB/kPa Relative humidity coeff. (no condens.): Not measurable dB/% Diameter: 13.2 mm Length: 16.2 mm Weight: 6 g

Discover the Norsonic NOR1228 Microphones/preamplifiers — engineered for precise, standards-compliant acoustic measurements. About All Norsonic microphones are free-field types. A free-field microphone is designed to measure the sound pressure in the sound field, compensating for the influence of the presence of the microphone in the sound field. In effect, the microphone measures the sound pressure as it existed before the microphone was introduced in the sound field, i.e. free-field conditions. Applicable standard is IEC 61672 and the former IEC 60651. The free-field microphone should be pointed towards the sound source at a 0° angle of incidence. Specifications Cartridge size: ½” inch Main standard: IEC 61672 Class 1 Polarisation voltage: 0 volt IEC 61094-4 Designation: WS2F Nominal sensitivity: 50 mV/Pa Frequency response: ±1dB 20-10k Hz, ±3 dB 12.5 – 16k Hz Maximum SPL (3% dist): 146 dB Self noise: 16 dB(A) Capacitance: 16 pF Temperature coeff. (250 Hz): <0.005 dB°C Max. temperature: 80 °C Static pressure coeff. (250 Hz): -0.004 dB/kPa Relative humidity coeff. (no condens.): -0.003 dB/% Diameter: 13.2 mm Length: 17.3 mm Weight: 9 g