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System and method for optimized playback of audio signals through headphones

An audio signal, earphone technology, applied in the field of systems and methods for optimizing the playback of audio signals through earphones, can solve problems such as insufficient precision to distinguish sensitivity or equalization requirements

Active Publication Date: 2014-01-29
MAXIM INTEGRATED PROD INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, this type of measurement is not precise enough to distinguish between a large number of headphone devices and their sensitivity or equalization requirements

Method used

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  • System and method for optimized playback of audio signals through headphones
  • System and method for optimized playback of audio signals through headphones
  • System and method for optimized playback of audio signals through headphones

Examples

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Embodiment Construction

[0016] figure 1 Presented by way of example and not limitation, a graph 100 of voltages provides a normalized 110 dB SPL sound output as a function of headphone impedance for a number of commercial headphone products. In this example, figure 1 The voltage plotted in is the voltage that produces a sound pressure level of 110dB (decibels) in the user's ear, and thus represents the sensitivity of various headphone devices. The diamond shapes drawn in the graph represent individual products. Data were collected at a fixed frequency of 1000Hz. as from figure 1 It can be noted that the impedance varies over a very wide range, from about 16 ohms to about 600 ohms, and the drive voltage (for this example of 110 dB SPL) varies from less than 0.1 volts to more than 10 volts. It can also be noticed that the sensitivity varies considerably even between products with the same rated impedance. For example, three products drawn at 16 ohms have sensitivities varying from about 0.08 volts...

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Abstract

The application discloses a system and method for playback of audio signals though a large variety of headphone devices. To optimize playback, the specific headphone device is identified so the proper amplifier gain and equalization settings can be applied. Such identification is determined by measuring the headphone impedance as a function of frequency, and comparing the impedance data with data of know devices in a database. Once a match is found, the appropriate audio gain and equalization settings can be applied.

Description

Background technique [0001] Users of mobile electronic devices, such as cell phones, MP3 players, and laptop computers, often utilize a number of different headset-type devices to listen to the audio output of their electronic devices. For example, users can use a headset / microphone combination for voice communication or for meetings in the workplace. The same user may listen to music with stereo headphones, and may use "earbud" devices while exercising. [0002] All of these different headphone types of listening devices may have compatibility issues for use with a single portable electronic device. First, sensitivity varies considerably between manufacturers and product types. Sensitivity is a measure of the amount of voltage (or power) required to produce a given sound pressure level (SPL) in the user's ear. Switching to a high-sensitivity headphone device after using a low-sensitivity device can cause pain and ear damage due to high SPL at the volume settings previously...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R29/00
CPCH04R29/00H04R1/1041
Inventor A·S·多伊
Owner MAXIM INTEGRATED PROD INC
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