เพิ่งค้นว่าทำไม Nokia N91 ถึงให้พลังเสียงที่ดีที่สุดตั้งแต่ที่เคยใช้โทรศัพท์มือถือมา
ก๊อปข้อความจากวิกิพีเดียมาครับ
The Nokia N91 has been praised with an impeccable reputation of the best sounding mobile phone ever produced (the majority of stand alone portable music players can hardly compete with it either).[5] The audio reproduction is spot on and is comparable to high end music systems. It is also considered to have the loudest audio output on a mobile phone. It's 'Loudness' and 'Stereo widening' effects, when used together, provide astonishing tonal clarity and dynamic range. The Nokia N91 uses a special DSP-33 chip set made by Toshiba and a powerful in-built Harman Kardon amplifier to boost up its volume while maintaining acoustics, resulting in louder, deep bass and rich sound with perfect low, mid range & a slightly damped high range frequency which has not been achieved by any iPod or Sony Walkmans.[6] The slight damping in the high frequency is a boon for music listeners as it wont strain the ears even after prolonged use. This is one of the few standard hand held devices which can drive high end & higher impedance headset's with considerable volume. Test conducted, the N91 wins over iPod Nano in its signal to noise ratio, output power at full volume, and output at 10–100 Hz.
