Announcing an upgrade in acoustic characteristics of the ultra - thin (0.5mm) piezoelectric speaker VSLBP2115E1100 series

The ultra - thin (0.5mm) piezoelectric speaker VSLBP2115E1100 series

6/30/2011

Murata Manufacturing Co., Ltd.
President/ Statutory Representative Director:
Tsuneo Murata

Production of this product has stopped. 
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The ultra - thin (0.5mm) piezoelectric speaker VSLBP2115E1100 series

Overview

Murata Manufacturing Co., Ltd. has successfully upgraded the acoustic characteristics of the world's thinnest piezoelectric speaker (0.5mm*) .

*VSLBF2115E1100 - T0 (caseless type)

Background

By optimizing product structure and developing new materials, we succeeded in reducing distortion*1 and upgrading the sound pressure level,*2 while maintaining the small product size.

With the recent growing trend to use mobile devices continuously for longer and longer periods of time, built - in batteries for these devices are becoming larger and larger. As the size of their batteries increases, the amount of space left for auditory and mechanical parts decreases, creating the need for even smaller and thinner speakers.

In addition to thinner parts, the back panels of Murata's piezoelectric speakers that are needed for driving the device are smaller. As these speakers are well - suited for use in narrow spaces, they are often employed in compact mobile devices.

At the same time, market users are requesting even better acoustic characteristics in piezoelectric speakers. We achieved the following improvements by modifying our components and diaphragm maintenance mechanism.

  1. Reduced distortion in the important voice - band region of 2 to 4 kHz (distortion is cut in half for 2 kHz voice - bands).
  2. Improved sound pressure in low-frequency regions of 1 kHz and below.

Terminology

*1 Distortion During speaker output, a high - frequency component is generated in addition to the original signal. Distortion is the value that represents the ratio of high - frequency component to original signal component. Lower distortion values translate to better acoustic characteristics.
*2 Sound pressure This refers to pressure changes in air when sound is transmitted through that air. Sound pressure is proportional to loudness.

Features

  1. Reduced distortion in the important voice - band region of 2 to 4 kHz (distortion is cut in half for 2 kHz voice - bands).

    (1) Reduced distortion in the important voice - band region of 2 to 4 kHz (distortion is cut in half for 2 kHz voice - bands).
  2. Improved sound pressure has been achieved in low - frequency regions of 1 kHz and below.

    (2) Improved sound pressure has been achieved in low - frequency regions of 1 kHz and below.
  3. The 0.5mm ultra - thin shape contributes to greater freedom of design.
  4. The speaker provides great acoustic characteristics even in narrow spaces.
  5. As no magnets are used, iron sand is not sucked into the speakers and there is no electromagnetic interference with magnetic sensors.

Applications

Mobile phones, tablet terminals, MIDs, E - books, portable music players, digital still cameras, digital video cameras, IC recorders, and other mobile devices.

Part Number

VSLBP2115E1100 - T1

Characteristics

Acoustic characteristics (input: 5Vrms sine wave; speaker microphone distance: 10cm; speaker back cavity: 1.0cc)

Average sound pressure: 93.5±3.0dB (1.0kHz、1.25kHz、1.5kHz、2.0kHz average)
Resonant frequency: 1150Hz±20%
Representative waveform

Representative waveform

Capacitance

1.5µF±30%

External Size

External Size

Production

One million units per month as of June 2011

Sample Price

250 yen

Piezoelectric Speakers

In addition to this newly released product, the Murata piezoelectric speaker product lineup includes the following standard products

  • VSLBP1913E1400 - T1 (compact, case type)
  • VSLBF1913E1400 - T1 (compact, caseless type)
  • VSLBG1914E1400 - T0 (compact, waterproof type)

For more information on our product lineup, please refer to the following URL (PDF: 874KB)


Murata in Brief

Murata Manufacturing Co., Ltd. is a worldwide leader in the design, manufacture and sale of ceramic-based passive electronic components & solutions, communication modules and power supply modules. Murata is committed to the development of advanced electronic materials and leading edge, multi-functional, high-density modules. The company has employees and manufacturing facilities throughout the world. For more information, visit Murata's website at www.murata.com