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AUTOMATIC MOBILE PHONE RINGER VOLUME ADJUSTMENT UNDER NOISY ENVIRONMENT

IP.com Disclosure Number: IPCOM000004689D
Original Publication Date: 2001-Apr-06
Included in the Prior Art Database: 2001-Apr-06
Document File: 2 page(s) / 12K

Publishing Venue

Motorola

Related People

Sathish KS: AUTHOR [+4]

Abstract

Mobile phones are used in many places such as; in the office, canteen, on the road, in the bus, train, car, shopping center or walkway.

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AUTOMATIC MOBILE PHONE RINGER VOLUME ADJUSTMENT UNDER NOISY ENVIRONMENT

by Sathish KS, Daniel Lim AB, Chng Kah Joo and Ong Beng Kee

ABSTRACT

Mobile phones are used in many places such as; in the office, canteen, on the road, in the bus, train, car, shopping center or walkway.

In many locations listed above, the amient noise level may be rather high. Consequently, a mobile phone user will find it very difficult to use the mobile phone is such locations.

To prevent missing and incoming call, a user could increase the ringing volume of the mobile phone by pressing several buttons and when he/she is in a quite location, the user would need to change the reset the ringing volume.

PROPOSE SOLUTION

To solve this problem, the present innovation seeks to use the processing capability of the built-in processor of the mobile phone to determine the background noise level.

CONCEPT:

When a call is received by a mobile phone, the processor would switch ON the microphone in the mouth piece of the mobile phone, and measure the background noise level. After the background noise level is determined, the volume of the ringer would be adjusted based on the following criteria:-

If the background noise level is much greater than a preset level, a silent alert or vibration mode is activated along with the ringer.

If the background noise is way below another preset level, the user may be in a seminar, an elevator lift or some other relatively quiet place. Here, the vibration mode is activated but the ringer could be temporarily switched OFF.

Between the above two preset levels, there could be another, 3rd. level such that there are 3 preset levels, namely, Low, Mid, and High whereby the volume of the ringer will be set accordingly using different audio pitch or higher ringer volume.

Figure 1 illustrates the hardware processing block which implements the noise detection function in a mobile phone. When the mobile phone receives a call, it will switch ON the microphone to measure the background noise.

The signal from the microphone is provided to a band-pass filter so as to allow the audible background noise to be processed by the circuit. The signal selected by the band-pass filter goes through an averaging circuit.

The signal further goes to the analog-digital-converter. The digitized signal is fed into the microprocessor already found in the mobile phone for processing as per criteria mentioned above.

This feature can be implemented easily with minimal cost as the hardware required is standard circuit building block.

[See the accompanying PDF file for the Figure]