2 sentences for 语调 (yǔ​diào — tone of voice)

1. 他的发言语调平板，听起来很乏味。

   tā de fā​yán yǔ​diào píng​bǎn, tīng qi​lai hěn fá​wèi.

   His speech was delivered in a flat tone and sounded very dull.

   Source: Dong Chinese Dictionary

2. 他用一种不友好的语调拒绝了我的请求。

   tā yòng yī zhǒng bù yǒu​hǎo de yǔ​diào jù​jué le wǒ de qǐng​qiú.

   He refused my request in an unfriendly tone.

   Source: Dong Chinese Dictionary