Products/Services for Decibel Meter Schematic

  • Noise Meters-Image
    Noise Meters - (20 companies) digital (ADC) converters can also add ADC noise to RF signals. To the human ear, the sounds that RF noise meters measure can sound like hiss or static. However, because RF noise can disrupt communications, the effects of meter noise must be factored... Learn More
  • Analog dBm Meters-Image
    Analog dBm Meters - (23 companies)
    Analog dBm Meters Information. Analog dBm meters are instruments that measure signal power. They display values on a dial, usually with a needle or moving pointer. Signal power, which can be expressed in decibels (dB) when the unit of reference... Search by Specification | Learn More
  • Sound Level Meters and Noise Dosimeters-Image
    Sound Level Meters and Noise Dosimeters - (233 companies)
    Sound level meters and noise dosimeters are used in sound and noise analysis. Applications include industrial safety, traffic noise studies, and scientific noise measurement. Sound Level Meters and Noise Dosimeters Information. Sound level meters... Search by Specification | Learn More
  • S Meters-Image
    S Meters - (13 companies)
    ...a receiver 's detector stage is applied to an ammeter. If the receiver has an automatic gain control (AGC) amplifier, this stage can be used to drive the S meter and control the gain of the receiver. S meters are calibrated in terms of S units up... Search by Specification | Learn More
  • Milliohm Meters-Image
    Milliohm Meters - (75 companies)
    Milliohm meters are capable of measuring very small resistances. Devices which use a four-wire Kelvin probe system pass a test current through the probe so that the voltage is sensed by the center pin. This test method eliminates contact resistance... Search by Specification | Learn More

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  • The Droitwich broadcasting station
    A schematic diagram, of the speech-input system is given in Fig. 32. The volume of the incoming pro- gramme, after equalization, is 16 decibels below " zero volume " (Zero volume is denned as that volume of programme which will give a maximum deflection during loud passages on a meter calibrated to read maximum …
  • A simplified auditory test for infants and young children
    Sound field and control room with schematic and instrumenta- tion used for Speech Reception Thresholds and Discrimination … room is less than 24 decibels , as measured by the General Radio Sound Level Meter set at position A.
    Figure 51: Schematic diagram illustrating the experimental set up of the control when comparing the materials used … The sound pressure level, in decibels [dB], was measured using a decibel meter made by EXTECH Instruments, model #407730.
  • Recent developments in radio-frequency cables
    Fig. 6.— Schematic of measurement equipment. block diagram of the apparatus. The signal is fed to the slotted line, and the voltage on the probe of the slotted line is measured by means of a ring detector, the output of which is fed into a v.s.w.r. meter calibrated in decibels .
  • Directional Couplers
    OSCILLATOR Fig. 9- Schematic diagram showing a power-measuring setup using the directional coupler as an attenuator. to powers in the milliwatt range, are available for use in the power meter . … power of the oscillator is 500 watts, the directional coupler should have 57 decibels attenuation to cut …
  • Aerodynamic Noise
    Fig. 7.3 Schematic sketch for measurement and data reduction for correlation … by comparison – beat methods – Cathode ray oscilloscope – Stroboscope – Electronic meters (accuracy ± 1 … … sound level meters are commercially available in which the former are very cheap, with several decibel ranges.
  • Experiences with the hearing width speech-audio meter
    We, sehlugen eiae, must it ~ mSglich is Priifanlage before 1, with wcleher to set the prerequisites in either decibel or La meter -distance information Spraehgeh6r under gleiehen that. … of Spraehaudiome ~ rie zngleieh ausgeffihrt is ~ out itself Lau~sprecher of a schematic representation of the …
  • A semi-automatic pen-recorder chart analyser
    A schematic diagram of the electrical connexions is given in Fig. 1, indicating the manner in which … Distribution curve in which abscissa represents percentage of time the field strength equals or exceeds ordinate value . strength in decibels relative to I pV/ metre , the nature of the scale being determined by the performance of the receiver, Fig. 4 shows the …
  • High-Index-Contrast Grating (HCG) and Its Applications in Optoelectronic Devices
    (a) Schematic of a 1-D HCG hollow-core slab waveguide structure consisting of two reflecting HCGs. Calculation of waveguide loss α (in decibels per meter ) at 1.55 µm for a 15-µm core slab HCG-HW as a function of (a) grating period and semi- conductor width and (b) thickness and semiconductor width.
  • Distortion Tests by the Intermodulation Method
    … the alternating-current com- ponent is amplified and measured by means of a copper-oxide-rectifier meter . The full schematic drawing of the frequency-combining unit is shown in Fig. 4 and the analyzer … … per cent to 100 per cent intermodulation; that is, a range of 60 decibels in convenient steps.