Audio Equipment

A:

Sound sensors work by detecting differences in air pressure and transforming them into electrical signals. Sound sensors such as microphones usually have built-in amplifiers that increase the strength of the incoming signal.

See Full Answer
Filed Under:
  • What are the advantages and disadvantages of a wireless microphone?

    Q: What are the advantages and disadvantages of a wireless microphone?

    A: The key advantage of a wireless microphone is that it gives greater freedom of movement. A notable disadvantage of a wireless microphone is that its operation time is limited by battery life. Compared to an ordinary condenser microphone, a wireless microphone runs on batteries that are greatly drained by the transmitting circuitry.
    See Full Answer
    Filed Under:
  • What color speaker wire is positive?

    Q: What color speaker wire is positive?

    A: In dealing with speaker wires, the positive speaker wire will be silver in color. This is only visible if the insulation is clear or see-through so that color can be distinguished. The negative wire will usually be copper in color for this same instance.
    See Full Answer
    Filed Under:
  • What is the standard headphone jack size?

    Q: What is the standard headphone jack size?

    A: Most cellular phones rely on headset jacks that are sized at 3.5mm. The same size ports are also found on current models of laptop and desktop computers from all manufacturers.
    See Full Answer
    Filed Under:
  • How loud is 50 decibels?

    Q: How loud is 50 decibels?

    A: Fifty decibels is the level of noise of a quiet conversation at home or a quiet stream. In comparison, the general base of 70 decibels is the noise level of a vacuum cleaner or of radio and TV audio.
    See Full Answer
    Filed Under:
  • What are the disadvantages of a radio?

    Q: What are the disadvantages of a radio?

    A: A radio does not have the same advantages as other means of communication and entertainment such as the television and the Internet. It lacks visual appeal as no pictures emanate from a radio. A radio signal has limited strength.
    See Full Answer
    Filed Under:
  • How do iPods work?

    Q: How do iPods work?

    A: The iPod, a digital music player, works by storing audio and video files on a hard drive. A graphical menu system allows users to access and play files. The device integrates with iTunes software on computers to back up files and purchase new media from the iTunes store online. Headphones are needed to hear audio on certain models of iPods, as of 2014.
    See Full Answer
    Filed Under:
  • How big is a CD case?

    Q: How big is a CD case?

    A: There are several different types of CD cases. The standard single CD jewel case usually measures 5.59 inches by 4.92 inches by 0.39 inches. Slimline cases usually measure 5.59 inches by 4.92 inches by 0.2 inches.
    See Full Answer
    Filed Under:
  • How does a radio work?

    Q: How does a radio work?

    A: According to the University of Southern California, radios work by encoding information on radio waves then broadcasting the radio wave with the encoded information onto a particular frequency. Both AM and FM radios use radio waves to transmit programs on radio stations.
    See Full Answer
    Filed Under:
  • How does a sound sensor work?

    Q: How does a sound sensor work?

    A: Sound sensors work by detecting differences in air pressure and transforming them into electrical signals. Sound sensors such as microphones usually have built-in amplifiers that increase the strength of the incoming signal.
    See Full Answer
    Filed Under:
  • What is the function of transistors?

    Q: What is the function of transistors?

    A: Transistors function as current amplifiers or binary switches. With amplification, a small current controls a gate for a greater current. As switches, a 5-volt threshold (gate open) equals binary digit one, less than 5 volts (gate closed) equals binary zero.
    See Full Answer
    Filed Under:
  • What is the purpose of a neutral wire?

    Q: What is the purpose of a neutral wire?

    A: The neutral wire in electronics is the wire in which electricity returns from the hot wire. It is also connected to the ground wire.
    See Full Answer
    Filed Under:
  • Why won't an MP3 player work?

    Q: Why won't an MP3 player work?

    A: An MP3 player contains a number of critical components, and a single failure can cause it to stop functioning. According to Sony, The best way to test an MP3 player to see if it still works is to charge it.
    See Full Answer
    Filed Under:
  • When did the first iPod come out?

    Q: When did the first iPod come out?

    A: The first iPod came out in October 2001. When it first hit the market, the 5-gigabyte first-generation iPod cost $399. In March 2002, a 10-gigabyte iPod model was released and sold for $499.
    See Full Answer
    Filed Under:
  • How do you listen through walls?

    Q: How do you listen through walls?

    A: Although sophisticated spying technology is available for purchase that uses contact microphones and amplifiers to listen through walls, it's also possible to create a listening mechanism using a small drill and plastic wrap. Because of the way the plastic wrap vibrates as sound passes through it, the sound wave travels faster as it goes through the hole, allowing for focused and efficient transmission of the sound.
    See Full Answer
    Filed Under:
  • How can I get better reception on my FM radio?

    Q: How can I get better reception on my FM radio?

    A: Getting better reception for an FM radio involves turning off other electronic devices that interfere with the radio's single, placing the radio in an area where it gets good reception or using the radio's antenna to its full potential. If the radio lacks an antenna, one is easily made using a piece of wire, such as a coat hanger.
    See Full Answer
    Filed Under:
  • How does a dipole antenna work?

    Q: How does a dipole antenna work?

    A: A dipole antenna uses two conductors of the same length to detect radio waves and transmit the corresponding variable electrical current to a receiver. Each conductor represents one-quarter of a wavelength, and when combined, the dipole can detect a half-wavelength signal. The length of the two conductors determines the operational frequency.
    See Full Answer
    Filed Under:
  • What is the difference between analog and digital signals?

    Q: What is the difference between analog and digital signals?

    A: The difference between analog and digital signals is that an analog signal is a continuous electrical message while digital is a series of values that represent information. Analog is conveyed by electrical current variations. Digital signals are relayed as a series of values that a device can read, such as a digital television.
    See Full Answer
    Filed Under:
  • How do earphones work?

    Q: How do earphones work?

    A: Earphones, or headphones, work similarly to speakers in that they turn electrical energy into sound by using magnetism and the vibration of air. While a large speaker vibrates the air in the space around it to create sound, a pair of earphones only vibrates the air inside the ear canal. Earphones are usually designed as either closed-back or open-back, which affects how much sound can escape from them.
    See Full Answer
    Filed Under:
  • What does RMS mean when referring to speakers?

    Q: What does RMS mean when referring to speakers?

    A: When referring to speakers, RMS stands for root mean square. It is a method used to calculate the power output of speakers for a given amount of time.
    See Full Answer
    Filed Under:
  • How do I transfer my CDs onto my MP3 player?

    Q: How do I transfer my CDs onto my MP3 player?

    A: To transfer music from a CD to an MP3 player, upload the music from the CD to a computer in the MP3 format. Attach the MP3 player to the computer, and transfer the music files.
    See Full Answer
    Filed Under:
  • What is the difference between two-way and three-way speakers?

    Q: What is the difference between two-way and three-way speakers?

    A: Two-way speakers consist of a woofer and a tweeter, and three-way speakers have a woofer, tweeter and mid-range component. The mid-range component is designed for sounds in the 160 Hz to 5.2 KHz range, such as the sounds of a saxophone, human voice or trumpets.
    See Full Answer
    Filed Under: